/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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 files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/* Programmer: 	Vailin Choi <vchoi@hdfgroup.org>
 *	       	May 2011; updated 10/2015
 *
 * Purpose:	Single Chunk I/O functions.  
 *		This is used when the dataset has only 1 chunk (with or without filter):
 *			cur_dims[] is equal to max_dims[] is equal to the chunk dims[]
 *		non-filter chunk record: [address of the chunk]
 *		filtered chunk record: 	[address of the chunk, chunk size, filter mask]
 *
 */

/****************/
/* Module Setup */
/****************/

#include "H5Dmodule.h"          /* This source code file is part of the H5D module */


/***********/
/* Headers */
/***********/
#include "H5private.h"		/* Generic Functions			*/
#include "H5Dpkg.h"		/* Datasets				*/
#include "H5Eprivate.h"		/* Error handling		  	*/
#include "H5FLprivate.h"	/* Free Lists                           */
#include "H5MFprivate.h"	/* File space management		*/
#include "H5VMprivate.h"         /* Vector functions			*/


/****************/
/* Local Macros */
/****************/


/******************/
/* Local Typedefs */
/******************/


/********************/
/* Local Prototypes */
/********************/

/* Single Chunk Index chunking I/O ops */
static herr_t H5D__single_idx_init(const H5D_chk_idx_info_t *idx_info,
    const H5S_t *space, haddr_t dset_ohdr_addr);
static herr_t H5D__single_idx_create(const H5D_chk_idx_info_t *idx_info);
static hbool_t H5D__single_idx_is_space_alloc(const H5O_storage_chunk_t *storage);
static herr_t H5D__single_idx_insert(const H5D_chk_idx_info_t *idx_info,
    H5D_chunk_ud_t *udata, const H5D_t *dset);
static herr_t H5D__single_idx_get_addr(const H5D_chk_idx_info_t *idx_info,
    H5D_chunk_ud_t *udata);
static int H5D__single_idx_iterate(const H5D_chk_idx_info_t *idx_info,
    H5D_chunk_cb_func_t chunk_cb, void *chunk_udata);
static herr_t H5D__single_idx_remove(const H5D_chk_idx_info_t *idx_info,
    H5D_chunk_common_ud_t *udata);
static herr_t H5D__single_idx_delete(const H5D_chk_idx_info_t *idx_info);
static herr_t H5D__single_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
    const H5D_chk_idx_info_t *idx_info_dst);
static herr_t H5D__single_idx_size(const H5D_chk_idx_info_t *idx_info,
    hsize_t *size);
static herr_t H5D__single_idx_reset(H5O_storage_chunk_t *storage, hbool_t reset_addr);
static herr_t H5D__single_idx_dump(const H5O_storage_chunk_t *storage, FILE *stream);


/*********************/
/* Package Variables */
/*********************/

/* Non Index chunk I/O ops */
const H5D_chunk_ops_t H5D_COPS_SINGLE[1] = {{
    FALSE,                      	/* Single Chunk indexing doesn't current support SWMR access */
    H5D__single_idx_init,		/* init */
    H5D__single_idx_create,		/* create */
    H5D__single_idx_is_space_alloc, 	/* is_space_alloc */
    H5D__single_idx_insert,	        /* insert */
    H5D__single_idx_get_addr,		/* get_addr */
    NULL,				/* resize */
    H5D__single_idx_iterate,		/* iterate */
    H5D__single_idx_remove,		/* remove */
    H5D__single_idx_delete,		/* delete */
    H5D__single_idx_copy_setup,		/* copy_setup */
    NULL,				/* copy_shutdown */
    H5D__single_idx_size,		/* size */
    H5D__single_idx_reset,		/* reset */
    H5D__single_idx_dump,		/* dump */
    NULL				/* destroy */
}};


/*****************************/
/* Library Private Variables */
/*****************************/


/*******************/
/* Local Variables */
/*******************/



/*-------------------------------------------------------------------------
 * Function:    H5D__single_idx_init
 *
 * Purpose:     Initialize the indexing information for a dataset.
 *
 * Return:      Non-negative on success/Negative on failure
 *
 * Programmer:  Vailin Choi
 *              July, 2011
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D__single_idx_init(const H5D_chk_idx_info_t *idx_info,
    const H5S_t H5_ATTR_UNUSED *space, haddr_t H5_ATTR_UNUSED dset_ohdr_addr)
{
    FUNC_ENTER_STATIC_NOERR

    /* Check args */
    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);

    if(idx_info->pline->nused)
	idx_info->layout->flags |= H5O_LAYOUT_CHUNK_SINGLE_INDEX_WITH_FILTER;
    else
	idx_info->layout->flags = 0;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5D__single_idx_init() */


/*-------------------------------------------------------------------------
 * Function:	H5D__single_idx_create
 *
 * Purpose:	Set up Single Chunk Index: filtered or non-filtered
 *		
 * Return:	Non-negative on success 
 *		Negative on failure.
 *
 * Programmer:	Vailin Choi; July 2011
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D__single_idx_create(const H5D_chk_idx_info_t *idx_info)
{
    FUNC_ENTER_STATIC_NOERR

    /* Check args */
    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);
    HDassert(idx_info->layout->max_nchunks == idx_info->layout->nchunks);
    HDassert(idx_info->layout->nchunks == 1);
    HDassert(!H5F_addr_defined(idx_info->storage->idx_addr));

    if(idx_info->pline->nused)
	HDassert(idx_info->layout->flags & H5O_LAYOUT_CHUNK_SINGLE_INDEX_WITH_FILTER);
    else
	HDassert(!(idx_info->layout->flags & H5O_LAYOUT_CHUNK_SINGLE_INDEX_WITH_FILTER));

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5D__single_idx_create() */


/*-------------------------------------------------------------------------
 * Function:	H5D__single_idx_is_space_alloc
 *
 * Purpose:	Query if space is allocated for the single chunk
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Vailin Choi; July 2011
 *
 *-------------------------------------------------------------------------
 */
static hbool_t
H5D__single_idx_is_space_alloc(const H5O_storage_chunk_t *storage)
{
    FUNC_ENTER_STATIC_NOERR

    /* Check args */
    HDassert(storage);

    FUNC_LEAVE_NOAPI((hbool_t)H5F_addr_defined(storage->idx_addr))
} /* end H5D__single_idx_is_space_alloc() */


/*-------------------------------------------------------------------------
 * Function:	H5D__single_idx_insert
 *
 * Purpose:	Allocate space for the single chunk
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Vailin Choi; July 2011
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D__single_idx_insert(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *udata,
    const H5D_t *dset)
{
    herr_t	ret_value = SUCCEED;	/* Return value */

    FUNC_ENTER_STATIC

    /* Sanity checks */
    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);
    HDassert(idx_info->layout->nchunks == 1);
    HDassert(idx_info->layout->max_nchunks == 1);
    HDassert(udata);

    /* Set the address for the chunk */
    HDassert(H5F_addr_defined(udata->chunk_block.offset));
    idx_info->storage->idx_addr = udata->chunk_block.offset;

    if(idx_info->pline->nused > 0) {
        H5_CHECKED_ASSIGN(idx_info->storage->u.single.nbytes, uint32_t, udata->chunk_block.length, hsize_t);
	idx_info->storage->u.single.filter_mask = udata->filter_mask;
    } /* end if */

    if(dset) {
	if(dset->shared->dcpl_cache.fill.alloc_time != H5D_ALLOC_TIME_EARLY || idx_info->pline->nused > 0) {
	    /* Mark the layout dirty so that the address of the single chunk will be flushed later */
	    if(H5D__mark(dset, idx_info->dxpl_id, H5D_MARK_LAYOUT) < 0)
		HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to mark layout as dirty")
	} /* end if */
    } /* end if */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5D__single_idx_insert() */


/*-------------------------------------------------------------------------
 * Function:	H5D__single_idx_get_addr
 *
 * Purpose:	Get the file address of a chunk.
 *		Save the retrieved information in the udata supplied.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Vailin Choi; July 2010
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D__single_idx_get_addr(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *udata)
{
    FUNC_ENTER_STATIC_NOERR

    /* Sanity checks */
    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);
    HDassert(idx_info->layout->nchunks == 1);
    HDassert(idx_info->layout->max_nchunks == 1);
    HDassert(udata);

    udata->chunk_block.offset = idx_info->storage->idx_addr;
    if(idx_info->layout->flags & H5O_LAYOUT_CHUNK_SINGLE_INDEX_WITH_FILTER) {
	udata->chunk_block.length = idx_info->storage->u.single.nbytes;
	udata->filter_mask = idx_info->storage->u.single.filter_mask;
    } /* end if */
    else {
	udata->chunk_block.length = idx_info->layout->size;
	udata->filter_mask = 0;
    } /* end else */
    if(!H5F_addr_defined(udata->chunk_block.offset))
        udata->chunk_block.length = 0;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5D__single_idx_get_addr() */


/*-------------------------------------------------------------------------
 * Function:	H5D__single_idx_iterate
 *
 * Purpose:	Make callback for the single chunk
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Vailin Choi; July 2010
 *
 *-------------------------------------------------------------------------
 */
static int
H5D__single_idx_iterate(const H5D_chk_idx_info_t *idx_info,
    H5D_chunk_cb_func_t chunk_cb, void *chunk_udata)
{
    H5D_chunk_rec_t chunk_rec;		/* generic chunk record  */
    int ret_value = -1;    		/* Return value */

    FUNC_ENTER_STATIC_NOERR

    /* Sanity checks */
    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);
    HDassert(chunk_cb);
    HDassert(chunk_udata);
    HDassert(H5F_addr_defined(idx_info->storage->idx_addr));

    /* Initialize generic chunk record */
    HDmemset(&chunk_rec, 0, sizeof(chunk_rec));
    chunk_rec.chunk_addr = idx_info->storage->idx_addr;

    if(idx_info->layout->flags & H5O_LAYOUT_CHUNK_SINGLE_INDEX_WITH_FILTER) {
	chunk_rec.nbytes = idx_info->storage->u.single.nbytes;
	chunk_rec.filter_mask = idx_info->storage->u.single.filter_mask;
    } /* end if */
    else {
	chunk_rec.nbytes = idx_info->layout->size;
	chunk_rec.filter_mask = 0;
    } /* end else */

    /* Make "generic chunk" callback */
    if((ret_value = (*chunk_cb)(&chunk_rec, chunk_udata)) < 0)
	HERROR(H5E_DATASET, H5E_CALLBACK, "failure in generic chunk iterator callback");

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D__single_idx_iterate() */


/*-------------------------------------------------------------------------
 * Function:	H5D__single_idx_remove
 *
 * Purpose:	Remove the single chunk
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Vailin Choi; July 2011
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D__single_idx_remove(const H5D_chk_idx_info_t *idx_info, H5D_chunk_common_ud_t H5_ATTR_UNUSED *udata)
{
    hsize_t nbytes;                 /* Size of all chunks */
    herr_t ret_value = SUCCEED;     /* Return value */

    FUNC_ENTER_STATIC

    /* Sanity checks */
    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);
    HDassert(H5F_addr_defined(idx_info->storage->idx_addr));

    if(idx_info->layout->flags & H5O_LAYOUT_CHUNK_SINGLE_INDEX_WITH_FILTER)
	nbytes = idx_info->storage->u.single.nbytes;
    else
	nbytes = idx_info->layout->size;

    if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, idx_info->dxpl_id, idx_info->storage->idx_addr, nbytes) < 0)
        HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, H5_ITER_ERROR, "unable to free dataset chunks")

    idx_info->storage->idx_addr = HADDR_UNDEF;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5D__single_idx_remove() */


/*-------------------------------------------------------------------------
 * Function:	H5D__single_idx_delete
 *
 * Purpose:	Delete raw data storage for entire dataset (i.e. the only chunk)
 *
 * Return:	Success:	Non-negative
 *		Failure:	negative
 *
 * Programmer:	Vailin Choi; Sept 2011
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D__single_idx_delete(const H5D_chk_idx_info_t *idx_info)
{
    herr_t ret_value = SUCCEED;     /* Return value */

    FUNC_ENTER_STATIC_NOERR

    /* Sanity checks */
    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);

    if(H5F_addr_defined(idx_info->storage->idx_addr))
	ret_value = H5D__single_idx_remove(idx_info, NULL);
    else
	HDassert(!H5F_addr_defined(idx_info->storage->idx_addr));

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D__single_idx_delete() */


/*-------------------------------------------------------------------------
 * Function:	H5D__single_idx_copy_setup
 *
 * Purpose:	Set up any necessary information for copying the single chunk
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Vailin Choi; Sept 2011
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D__single_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
    const H5D_chk_idx_info_t *idx_info_dst)
{
    herr_t      ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_STATIC

    /* Check args */
    HDassert(idx_info_src);
    HDassert(idx_info_src->f);
    HDassert(idx_info_src->pline);
    HDassert(idx_info_src->layout);
    HDassert(idx_info_src->storage);
    HDassert(H5F_addr_defined(idx_info_src->storage->idx_addr));

    HDassert(idx_info_dst);
    HDassert(idx_info_dst->f);
    HDassert(idx_info_dst->pline);
    HDassert(idx_info_dst->layout);
    HDassert(idx_info_dst->storage);

    /* Set copied metadata tag */
    H5_BEGIN_TAG(idx_info_dst->dxpl_id, H5AC__COPIED_TAG, FAIL);

    /* Set up information at the destination file */
    if(H5D__single_idx_create(idx_info_dst) < 0)
        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize chunked storage")

    /* Reset metadata tag */
    H5_END_TAG(FAIL);

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D__single_idx_copy_setup() */


/*-------------------------------------------------------------------------
 * Function:    H5D__single_idx_size
 *
 * Purpose:     Retrieve the amount of index storage for the chunked dataset
 *
 * Return:      Success:        Non-negative
 *              Failure:        negative
 *
 * Programmer:	Vailin Choi; Sept 2011
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D__single_idx_size(const H5D_chk_idx_info_t H5_ATTR_UNUSED *idx_info, hsize_t *index_size)
{
    FUNC_ENTER_STATIC_NOERR

    /* Check args */
    HDassert(index_size);

    *index_size = 0;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5D__single_idx_size() */


/*-------------------------------------------------------------------------
 * Function:	H5D__single_idx_reset
 *
 * Purpose:	Reset indexing information.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Vailin Choi; Sept 2011
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D__single_idx_reset(H5O_storage_chunk_t *storage, hbool_t reset_addr)
{
    FUNC_ENTER_STATIC_NOERR

    /* Check args */
    HDassert(storage);

    /* Reset index info */
    if(reset_addr)
	storage->idx_addr = HADDR_UNDEF;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5D__single_idx_reset() */


/*-------------------------------------------------------------------------
 * Function:	H5D__single_idx_dump
 *
 * Purpose:	Dump the address of the single chunk
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Vailin Choi; September 2011
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D__single_idx_dump(const H5O_storage_chunk_t *storage, FILE *stream)
{
    FUNC_ENTER_STATIC_NOERR

    /* Check args */
    HDassert(storage);
    HDassert(stream);

    HDfprintf(stream, "    Address: %a\n", storage->idx_addr);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5D__single_idx_dump() */

