/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

 * Copyright by The HDF Group.                                               *

 * 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 LICENSE file, which can be found at the root of the source code       *

 * distribution tree, or in https://www.hdfgroup.org/licenses.               *

 * If you do not have access to either file, you may request a copy from     *

 * help@hdfgroup.org.                                                        *

 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*

 * Purpose: "All" selection dataspace I/O functions.

 */

/****************/

/* Module Setup */

/****************/

#include "H5Smodule.h" /* This source code file is part of the H5S module */

/***********/

/* Headers */

/***********/

#include "H5private.h"   /* Generic Functions                        */

#include "H5Eprivate.h"  /* Error handling                           */

#include "H5Iprivate.h"  /* ID Functions                             */

#include "H5Spkg.h"      /* Dataspace functions                      */

#include "H5VMprivate.h" /* Vector functions                         */

/****************/

/* Local Macros */

/****************/

/******************/

/* Local Typedefs */

/******************/

/********************/

/* Local Prototypes */

/********************/

/* Selection callbacks */

static herr_t   H5S__all_copy(H5S_t *dst, const H5S_t *src, bool share_selection);

static herr_t   H5S__all_release(H5S_t *space);

static htri_t   H5S__all_is_valid(const H5S_t *space);

static hssize_t H5S__all_serial_size(H5S_t *space);

static herr_t   H5S__all_serialize(H5S_t *space, uint8_t **p);

static herr_t   H5S__all_deserialize(H5S_t **space, const uint8_t **p, const size_t p_size, bool skip);

static herr_t   H5S__all_bounds(const H5S_t *space, hsize_t *start, hsize_t *end);

static herr_t   H5S__all_offset(const H5S_t *space, hsize_t *off);

static int      H5S__all_unlim_dim(const H5S_t *space);

static htri_t   H5S__all_is_contiguous(const H5S_t *space);

static htri_t   H5S__all_is_single(const H5S_t *space);

static htri_t   H5S__all_is_regular(H5S_t *space);

static htri_t   H5S__all_shape_same(H5S_t *space1, H5S_t *space2);

static htri_t   H5S__all_intersect_block(H5S_t *space, const hsize_t *start, const hsize_t *end);

static herr_t   H5S__all_adjust_u(H5S_t *space, const hsize_t *offset);

static herr_t   H5S__all_adjust_s(H5S_t *space, const hssize_t *offset);

static herr_t   H5S__all_project_scalar(const H5S_t *space, hsize_t *offset);

static herr_t   H5S__all_project_simple(const H5S_t *space, H5S_t *new_space, hsize_t *offset);

static herr_t   H5S__all_iter_init(H5S_t *space, H5S_sel_iter_t *iter);

/* Selection iteration callbacks */

static herr_t  H5S__all_iter_coords(const H5S_sel_iter_t *iter, hsize_t *coords);

static herr_t  H5S__all_iter_block(const H5S_sel_iter_t *iter, hsize_t *start, hsize_t *end);

static hsize_t H5S__all_iter_nelmts(const H5S_sel_iter_t *iter);

static htri_t  H5S__all_iter_has_next_block(const H5S_sel_iter_t *iter);

static herr_t  H5S__all_iter_next(H5S_sel_iter_t *sel_iter, size_t nelem);

static herr_t  H5S__all_iter_next_block(H5S_sel_iter_t *sel_iter);

static herr_t  H5S__all_iter_get_seq_list(H5S_sel_iter_t *iter, size_t maxseq, size_t maxbytes, size_t *nseq,

                                          size_t *nbytes, hsize_t *off, size_t *len);

static herr_t  H5S__all_iter_release(H5S_sel_iter_t *sel_iter);

/*****************************/

/* Library Private Variables */

/*****************************/

/*********************/

/* Package Variables */

/*********************/

/* Selection properties for "all" selections */

const H5S_select_class_t H5S_sel_all[1] = {{

    H5S_SEL_ALL,

    /* Methods on selection */

    H5S__all_copy,

    H5S__all_release,

    H5S__all_is_valid,

    H5S__all_serial_size,

    H5S__all_serialize,

    H5S__all_deserialize,

    H5S__all_bounds,

    H5S__all_offset,

    H5S__all_unlim_dim,

    NULL,

    H5S__all_is_contiguous,

    H5S__all_is_single,

    H5S__all_is_regular,

    H5S__all_shape_same,

    H5S__all_intersect_block,

    H5S__all_adjust_u,

    H5S__all_adjust_s,

    H5S__all_project_scalar,

    H5S__all_project_simple,

    H5S__all_iter_init,

}};

/*******************/

/* Local Variables */

/*******************/

/* Iteration properties for "all" selections */

static const H5S_sel_iter_class_t H5S_sel_iter_all[1] = {{

    H5S_SEL_ALL,

    /* Methods on selection iterator */

    H5S__all_iter_coords,

    H5S__all_iter_block,

    H5S__all_iter_nelmts,

    H5S__all_iter_has_next_block,

    H5S__all_iter_next,

    H5S__all_iter_next_block,

    H5S__all_iter_get_seq_list,

    H5S__all_iter_release,

}};

/*-------------------------------------------------------------------------

 * Function:  H5S__all_iter_init

 *

 * Purpose: Initializes iteration information for "all" selection.

 *

 * Return:  Non-negative on success, negative on failure.

 *

 *-------------------------------------------------------------------------

 */

static herr_t

H5S__all_iter_init(H5S_t H5_ATTR_UNUSED *space, H5S_sel_iter_t *iter)

{

    FUNC_ENTER_PACKAGE_NOERR

    /* Check args */

    assert(space && H5S_SEL_ALL == H5S_GET_SELECT_TYPE(space));

    assert(iter);

    /* Start at the upper left location */

    iter->u.all.elmt_offset = 0;

    iter->u.all.byte_offset = 0;

    /* Initialize type of selection iterator */

    iter->type = H5S_sel_iter_all;

    FUNC_LEAVE_NOAPI(SUCCEED)

} /* end H5S__all_iter_init() */

/*-------------------------------------------------------------------------

 * Function:  H5S__all_iter_coords

 *

 * Purpose: Retrieve the current coordinates of iterator for current

 *              selection

 *

 * Return:  Non-negative on success, negative on failure

 *

 *-------------------------------------------------------------------------

 */

static herr_t

H5S__all_iter_coords(const H5S_sel_iter_t *iter, hsize_t *coords)

{

    herr_t ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE

    /* Check args */

    assert(iter);

    assert(coords);

    /* Calculate the coordinates for the current iterator offset */

    if (H5VM_array_calc(iter->u.all.elmt_offset, iter->rank, iter->dims, coords) < 0)

        HGOTO_ERROR(H5E_DATASPACE, H5E_CANTGET, FAIL, "can't retrieve coordinates");

done:

    FUNC_LEAVE_NOAPI(ret_value)

} /* end H5S__all_iter_coords() */

/*-------------------------------------------------------------------------

 * Function:  H5S__all_iter_block

 *

 * Purpose: Retrieve the current block of iterator for current

 *              selection

 *

 * Return:  Non-negative on success, negative on failure

 *

 *-------------------------------------------------------------------------

 */

static herr_t

H5S__all_iter_block(const H5S_sel_iter_t *iter, hsize_t *start, hsize_t *end)

{

    unsigned u; /* Local index variable */

    FUNC_ENTER_PACKAGE_NOERR

    /* Check args */

    assert(iter);

    assert(start);

    assert(end);

    for (u = 0; u < iter->rank; u++) {

        /* Set the start of the 'all' block */

        /* (Always '0' coordinates for now) */

        start[u] = 0;

        /* Compute the end of the 'all' block */

        /* (Always size of the extent for now) */

        end[u] = iter->dims[u] - 1;

    } /* end for */

    FUNC_LEAVE_NOAPI(SUCCEED)

} /* end H5S__all_iter_block() */

/*-------------------------------------------------------------------------

 * Function:  H5S__all_iter_nelmts

 *

 * Purpose: Return number of elements left to process in iterator

 *

 * Return:  Non-negative number of elements on success, zero on failure

 *

 *-------------------------------------------------------------------------

 */

static hsize_t

H5S__all_iter_nelmts(const H5S_sel_iter_t *iter)

{

    FUNC_ENTER_PACKAGE_NOERR

    /* Check args */

    assert(iter);

    FUNC_LEAVE_NOAPI(iter->elmt_left)

} /* end H5S__all_iter_nelmts() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_iter_has_next_block

 PURPOSE

    Check if there is another block left in the current iterator

 USAGE

    htri_t H5S__all_iter_has_next_block(iter)

        const H5S_sel_iter_t *iter;       IN: Pointer to selection iterator

 RETURNS

    Non-negative (true/false) on success/Negative on failure

 DESCRIPTION

    Check if there is another block available in the selection iterator.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static htri_t

H5S__all_iter_has_next_block(const H5S_sel_iter_t H5_ATTR_UNUSED *iter)

{

    FUNC_ENTER_PACKAGE_NOERR

    /* Check args */

    assert(iter);

    FUNC_LEAVE_NOAPI(false)

} /* end H5S__all_iter_has_next_block() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_iter_next

 PURPOSE

    Increment selection iterator

 USAGE

    herr_t H5S__all_iter_next(iter, nelem)

        H5S_sel_iter_t *iter;       IN: Pointer to selection iterator

        size_t nelem;               IN: Number of elements to advance by

 RETURNS

    Non-negative on success/Negative on failure

 DESCRIPTION

    Advance selection iterator to the NELEM'th next element in the selection.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static herr_t

H5S__all_iter_next(H5S_sel_iter_t *iter, size_t nelem)

{

    FUNC_ENTER_PACKAGE_NOERR

    /* Check args */

    assert(iter);

    assert(nelem > 0);

    /* Increment the iterator */

    iter->u.all.elmt_offset += nelem;

    iter->u.all.byte_offset += (nelem * iter->elmt_size);

    FUNC_LEAVE_NOAPI(SUCCEED)

} /* end H5S__all_iter_next() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_iter_next_block

 PURPOSE

    Increment selection iterator to next block

 USAGE

    herr_t H5S__all_iter_next_block(iter)

        H5S_sel_iter_t *iter;       IN: Pointer to selection iterator

 RETURNS

    Non-negative on success/Negative on failure

 DESCRIPTION

    Advance selection iterator to the next block in the selection.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static herr_t

H5S__all_iter_next_block(H5S_sel_iter_t H5_ATTR_UNUSED *iter)

{

    FUNC_ENTER_PACKAGE_NOERR

    /* Check args */

    assert(iter);

    FUNC_LEAVE_NOAPI(FAIL)

} /* end H5S__all_iter_next_block() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_iter_get_seq_list

 PURPOSE

    Create a list of offsets & lengths for a selection

 USAGE

    herr_t H5S__all_iter_get_seq_list(iter,maxseq,maxelem,nseq,nelem,off,len)

        H5S_sel_iter_t *iter;   IN/OUT: Selection iterator describing last

                                    position of interest in selection.

        size_t maxseq;          IN: Maximum number of sequences to generate

        size_t maxelem;         IN: Maximum number of elements to include in the

                                    generated sequences

        size_t *nseq;           OUT: Actual number of sequences generated

        size_t *nelem;          OUT: Actual number of elements in sequences generated

        hsize_t *off;           OUT: Array of offsets

        size_t *len;            OUT: Array of lengths

 RETURNS

    Non-negative on success/Negative on failure.

 DESCRIPTION

    Use the selection in the dataspace to generate a list of byte offsets and

    lengths for the region(s) selected.  Start/Restart from the position in the

    ITER parameter.  The number of sequences generated is limited by the MAXSEQ

    parameter and the number of sequences actually generated is stored in the

    NSEQ parameter.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static herr_t

H5S__all_iter_get_seq_list(H5S_sel_iter_t *iter, size_t H5_ATTR_UNUSED maxseq, size_t maxelem, size_t *nseq,

                           size_t *nelem, hsize_t *off, size_t *len)

{

    size_t elem_used; /* The number of elements used */

    FUNC_ENTER_PACKAGE_NOERR

    /* Check args */

    assert(iter);

    assert(maxseq > 0);

    assert(maxelem > 0);

    assert(nseq);

    assert(nelem);

    assert(off);

    assert(len);

    /* Determine the actual number of elements to use */

    H5_CHECK_OVERFLOW(iter->elmt_left, hsize_t, size_t);

    elem_used = MIN(maxelem, (size_t)iter->elmt_left);

    assert(elem_used > 0);

    /* Compute the offset in the dataset */

    off[0] = iter->u.all.byte_offset;

    len[0] = elem_used * iter->elmt_size;

    /* Should only need one sequence for 'all' selections */

    *nseq = 1;

    /* Set the number of elements used */

    *nelem = elem_used;

    /* Update the iterator */

    iter->elmt_left -= elem_used;

    iter->u.all.elmt_offset += elem_used;

    iter->u.all.byte_offset += len[0];

    FUNC_LEAVE_NOAPI(SUCCEED)

} /* end H5S__all_iter_get_seq_list() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_iter_release

 PURPOSE

    Release "all" selection iterator information for a dataspace

 USAGE

    herr_t H5S__all_iter_release(iter)

        H5S_sel_iter_t *iter;       IN: Pointer to selection iterator

 RETURNS

    Non-negative on success/Negative on failure

 DESCRIPTION

    Releases all information for a dataspace "all" selection iterator

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static herr_t

H5S__all_iter_release(H5S_sel_iter_t H5_ATTR_UNUSED *iter)

{

    FUNC_ENTER_PACKAGE_NOERR

    /* Check args */

    assert(iter);

    FUNC_LEAVE_NOAPI(SUCCEED)

} /* end H5S__all_iter_release() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_release

 PURPOSE

    Release all selection information for a dataspace

 USAGE

    herr_t H5S__all_release(space)

        H5S_t *space;       IN: Pointer to dataspace

 RETURNS

    Non-negative on success/Negative on failure

 DESCRIPTION

    Releases "all" selection information for a dataspace

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static herr_t

H5S__all_release(H5S_t *space)

{

    FUNC_ENTER_PACKAGE_NOERR

    /* Check args */

    assert(space);

    /* Reset the number of elements in the selection */

    space->select.num_elem = 0;

    FUNC_LEAVE_NOAPI(SUCCEED)

} /* end H5S__all_release() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_copy

 PURPOSE

    Copy a selection from one dataspace to another

 USAGE

    herr_t H5S__all_copy(dst, src, share_selection)

        H5S_t *dst;  OUT: Pointer to the destination dataspace

        H5S_t *src;  IN: Pointer to the source dataspace

        bool;     IN: Whether to share the selection between the dataspaces

 RETURNS

    Non-negative on success/Negative on failure

 DESCRIPTION

    Copies the 'all' selection information from the source

    dataspace to the destination dataspace.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static herr_t

H5S__all_copy(H5S_t *dst, const H5S_t H5_ATTR_UNUSED *src, bool H5_ATTR_UNUSED share_selection)

{

    FUNC_ENTER_PACKAGE_NOERR

    assert(src);

    assert(dst);

    /* Set number of elements in selection */

    dst->select.num_elem = (hsize_t)H5S_GET_EXTENT_NPOINTS(dst);

    FUNC_LEAVE_NOAPI(SUCCEED)

} /* end H5S__all_copy() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_is_valid

 PURPOSE

    Check whether the selection fits within the extent, with the current

    offset defined.

 USAGE

    htri_t H5S__all_is_valid(space);

        H5S_t *space;             IN: Dataspace pointer to query

 RETURNS

    true if the selection fits within the extent, false if it does not and

        Negative on an error.

 DESCRIPTION

    Determines if the current selection at the current offset fits within the

    extent for the dataspace.  Offset is irrelevant for this type of selection.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static htri_t

H5S__all_is_valid(const H5S_t H5_ATTR_UNUSED *space)

{

    FUNC_ENTER_PACKAGE_NOERR

    assert(space);

    FUNC_LEAVE_NOAPI(true)

} /* end H5S__all_is_valid() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_serial_size

 PURPOSE

    Determine the number of bytes needed to store the serialized "all"

        selection information.

 USAGE

    hssize_t H5S__all_serial_size(space)

        H5S_t *space;             IN: Dataspace pointer to query

 RETURNS

    The number of bytes required on success, negative on an error.

 DESCRIPTION

    Determines the number of bytes required to serialize an "all"

    selection for storage on disk.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static hssize_t

H5S__all_serial_size(H5S_t H5_ATTR_UNUSED *space)

{

    FUNC_ENTER_PACKAGE_NOERR

    assert(space);

    /* Basic number of bytes required to serialize point selection:

     *  <type (4 bytes)> + <version (4 bytes)> + <padding (4 bytes)> +

     *      <length (4 bytes)> = 16 bytes

     */

    FUNC_LEAVE_NOAPI(16)

} /* end H5S__all_serial_size() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_serialize

 PURPOSE

    Serialize the current selection into a user-provided buffer.

 USAGE

    herr_t H5S__all_serialize(space, p)

        H5S_t *space;           IN: Dataspace with selection to serialize

        uint8_t **p;            OUT: Pointer to buffer to put serialized

                                selection.  Will be advanced to end of

                                serialized selection.

 RETURNS

    Non-negative on success/Negative on failure

 DESCRIPTION

    Serializes the current element selection into a buffer.  (Primarily for

    storing on disk).

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static herr_t

H5S__all_serialize(H5S_t *space, uint8_t **p)

{

    uint8_t *pp = (*p); /* Local pointer for decoding */

    FUNC_ENTER_PACKAGE_NOERR

    /* Check args */

    assert(space);

    assert(p);

    assert(pp);

    /* Store the preamble information */

    UINT32ENCODE(pp, (uint32_t)H5S_GET_SELECT_TYPE(space)); /* Store the type of selection */

    UINT32ENCODE(pp, (uint32_t)H5S_ALL_VERSION_1);          /* Store the version number */

    UINT32ENCODE(pp, (uint32_t)0);                          /* Store the un-used padding */

    UINT32ENCODE(pp, (uint32_t)0);                          /* Store the additional information length */

    /* Update encoding pointer */

    *p = pp;

    FUNC_LEAVE_NOAPI(SUCCEED)

} /* end H5S__all_serialize() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_deserialize

 PURPOSE

    Deserialize the current selection from a user-provided buffer.

 USAGE

    herr_t H5S_all_deserialize(space, p)

        H5S_t **space;          IN/OUT: Dataspace pointer to place

                                selection into

        uint8 **p;              OUT: Pointer to buffer holding serialized

                                selection.  Will be advanced to end of

                                serialized selection.

 RETURNS

    Non-negative on success/Negative on failure

 DESCRIPTION

    Deserializes the current selection into a buffer.  (Primarily for retrieving

    from disk).

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static herr_t

H5S__all_deserialize(H5S_t **space, const uint8_t **p, const size_t p_size, bool skip)

{

    const uint8_t *p_end;

    uint32_t       version;  /* Version number */

    H5S_t *tmp_space = NULL; /* Pointer to actual dataspace to use, either *space or a newly allocated one */

    herr_t ret_value = SUCCEED; /* return value */

    FUNC_ENTER_PACKAGE

    assert(p);

    assert(*p);

    if (skip)

        p_end = *p;

    else

        p_end = *p + p_size - 1; /* Pointer to last valid byte in buffer */

    /* As part of the efforts to push all selection-type specific coding

       to the callbacks, the coding for the allocation of a null dataspace

       is moved from H5S_select_deserialize() in H5Sselect.c.

       This is needed for decoding virtual layout in H5O__layout_decode() */

    /* Allocate space if not provided */

    if (!*space) {

        if (NULL == (tmp_space = H5S_create(H5S_SIMPLE)))

            HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCREATE, FAIL, "can't create dataspace");

    } /* end if */

    else

        tmp_space = *space;

    /* Decode version */

    if (H5_IS_KNOWN_BUFFER_OVERFLOW(skip, *p, sizeof(uint32_t), p_end))

        HGOTO_ERROR(H5E_DATASPACE, H5E_OVERFLOW, FAIL, "buffer overflow while decoding selection version");

    UINT32DECODE(*p, version);

    if (version < H5S_ALL_VERSION_1 || version > H5S_ALL_VERSION_LATEST)

        HGOTO_ERROR(H5E_DATASPACE, H5E_BADVALUE, FAIL, "bad version number for all selection");

    /* Skip over the remainder of the header */

    if (H5_IS_KNOWN_BUFFER_OVERFLOW(skip, *p, 8, p_end))

        HGOTO_ERROR(H5E_DATASPACE, H5E_OVERFLOW, FAIL, "buffer overflow while decoding header");

    *p += 8;

    /* Change to "all" selection */

    if (H5S_select_all(tmp_space, true) < 0)

        HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't change selection");

    /* Return space to the caller if allocated */

    if (!*space)

        *space = tmp_space;

done:

    /* Free temporary space if not passed to caller (only happens on error) */

    if (!*space && tmp_space)

        if (H5S_close(tmp_space) < 0)

            HDONE_ERROR(H5E_DATASPACE, H5E_CANTFREE, FAIL, "can't close dataspace");

    FUNC_LEAVE_NOAPI(ret_value)

} /* end H5S__all_deserialize() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_bounds

 PURPOSE

    Gets the bounding box containing the selection.

 USAGE

    herr_t H5S__all_bounds(space, start, end)

        H5S_t *space;           IN: Dataspace pointer of selection to query

        hsize_t *start;         OUT: Starting coordinate of bounding box

        hsize_t *end;           OUT: Opposite coordinate of bounding box

 RETURNS

    Non-negative on success, negative on failure

 DESCRIPTION

    Retrieves the bounding box containing the current selection and places

    it into the user's buffers.  The start and end buffers must be large

    enough to hold the dataspace rank number of coordinates.  The bounding box

    exactly contains the selection, ie. if a 2-D element selection is currently

    defined with the following points: (4,5), (6,8) (10,7), the bounding box

    with be (4, 5), (10, 8).  Calling this function on a "none" selection

    returns fail.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static herr_t

H5S__all_bounds(const H5S_t *space, hsize_t *start, hsize_t *end)

{

    unsigned rank; /* Dataspace rank */

    unsigned i;    /* index variable */

    FUNC_ENTER_PACKAGE_NOERR

    assert(space);

    assert(start);

    assert(end);

    /* Get the dataspace extent rank */

    rank = space->extent.rank;

    /* Just copy over the complete extent */

    for (i = 0; i < rank; i++) {

        start[i] = 0;

        end[i]   = space->extent.size[i] - 1;

    } /* end for */

    FUNC_LEAVE_NOAPI(SUCCEED)

} /* end H5S__all_bounds() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_offset

 PURPOSE

    Gets the linear offset of the first element for the selection.

 USAGE

    herr_t H5S__all_offset(space, offset)

        const H5S_t *space;     IN: Dataspace pointer of selection to query

        hsize_t *offset;        OUT: Linear offset of first element in selection

 RETURNS

    Non-negative on success, negative on failure

 DESCRIPTION

    Retrieves the linear offset (in "units" of elements) of the first element

    selected within the dataspace.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

    Calling this function on a "none" selection returns fail.

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static herr_t

H5S__all_offset(const H5S_t H5_ATTR_UNUSED *space, hsize_t *offset)

{

    FUNC_ENTER_PACKAGE_NOERR

    assert(space);

    assert(offset);

    /* 'All' selections always start at offset 0 */

    *offset = 0;

    FUNC_LEAVE_NOAPI(SUCCEED)

} /* end H5S__all_offset() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_unlim_dim

 PURPOSE

    Return unlimited dimension of selection, or -1 if none

 USAGE

    int H5S__all_unlim_dim(space)

        H5S_t *space;           IN: Dataspace pointer to check

 RETURNS

    Unlimited dimension of selection, or -1 if none (never fails).

 DESCRIPTION

    Returns the index of the unlimited dimension in this selection, or -1

    if the selection has no unlimited dimension.  "All" selections are

    always unlimited in every dimension, though this is not reflected in

    other calls, where the selection is "clipped" against the current

    extent, so for consistency this function always returns -1.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static int

H5S__all_unlim_dim(const H5S_t H5_ATTR_UNUSED *space)

{

    FUNC_ENTER_PACKAGE_NOERR

    FUNC_LEAVE_NOAPI(-1)

} /* end H5S__all_unlim_dim() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_is_contiguous

 PURPOSE

    Check if a "all" selection is contiguous within the dataspace extent.

 USAGE

    htri_t H5S__all_is_contiguous(space)

        H5S_t *space;           IN: Dataspace pointer to check

 RETURNS

    true/false/FAIL

 DESCRIPTION

    Checks to see if the current selection in the dataspace is contiguous.

    This is primarily used for reading the entire selection in one swoop.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static htri_t

H5S__all_is_contiguous(const H5S_t H5_ATTR_UNUSED *space)

{

    FUNC_ENTER_PACKAGE_NOERR

    assert(space);

    FUNC_LEAVE_NOAPI(true)

} /* end H5S__all_is_contiguous() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_is_single

 PURPOSE

    Check if a "all" selection is a single block within the dataspace extent.

 USAGE

    htri_t H5S__all_is_single(space)

        H5S_t *space;           IN: Dataspace pointer to check

 RETURNS

    true/false/FAIL

 DESCRIPTION

    Checks to see if the current selection in the dataspace is a single block.

    This is primarily used for reading the entire selection in one swoop.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static htri_t

H5S__all_is_single(const H5S_t H5_ATTR_UNUSED *space)

{

    FUNC_ENTER_PACKAGE_NOERR

    assert(space);

    FUNC_LEAVE_NOAPI(true)

} /* end H5S__all_is_single() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_is_regular

 PURPOSE

    Check if a "all" selection is "regular"

 USAGE

    htri_t H5S__all_is_regular(space)

        H5S_t *space;     IN: Dataspace pointer to check

 RETURNS

    true/false/FAIL

 DESCRIPTION

    Checks to see if the current selection in a dataspace is the a regular

    pattern.

    This is primarily used for reading the entire selection in one swoop.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static htri_t

H5S__all_is_regular(H5S_t H5_ATTR_UNUSED *space)

{

    FUNC_ENTER_PACKAGE_NOERR

    /* Check args */

    assert(space);

    FUNC_LEAVE_NOAPI(true)

} /* end H5S__all_is_regular() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_shape_same

 PURPOSE

    Check if a two "all" selections are the same shape

 USAGE

    htri_t H5S__all_shape_same(space1, space2)

        H5S_t *space1;           IN: First dataspace to check

        H5S_t *space2;           IN: Second dataspace to check

 RETURNS

    true / false / FAIL

 DESCRIPTION

    Checks to see if the current selection in each dataspace are the same

    shape.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static htri_t

H5S__all_shape_same(H5S_t *space1, H5S_t *space2)

{

    int    space1_dim;       /* Current dimension in first dataspace */

    int    space2_dim;       /* Current dimension in second dataspace */

    htri_t ret_value = true; /* Return value */

    FUNC_ENTER_PACKAGE_NOERR

    /* Check args */

    assert(space1);

    assert(space2);

    /* Initialize dataspace dims */

    space1_dim = (int)space1->extent.rank - 1;

    space2_dim = (int)space2->extent.rank - 1;

    /* Recall that space1_rank >= space2_rank.

     *

     * In the following while loop, we test to see if space1 and space2

     * have identical size in all dimensions they have in common.

     */

    while (space2_dim >= 0) {

        if (space1->extent.size[space1_dim] != space2->extent.size[space2_dim])

            HGOTO_DONE(false);

        space1_dim--;

        space2_dim--;

    } /* end while */

    /* Since we are selecting the entire space, we must also verify that space1

     * has size 1 in all dimensions that it does not share with space2.

     */

    while (space1_dim >= 0) {

        if (space1->extent.size[space1_dim] != 1)

            HGOTO_DONE(false);

        space1_dim--;

    } /* end while */

done:

    FUNC_LEAVE_NOAPI(ret_value)

} /* end H5S__all_shape_same() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_intersect_block

 PURPOSE

    Detect intersections of selection with block

 USAGE

    htri_t H5S__all_intersect_block(space, start, end)

        H5S_t *space;           IN: Dataspace with selection to use

        const hsize_t *start;   IN: Starting coordinate for block

        const hsize_t *end;     IN: Ending coordinate for block

 RETURNS

    Non-negative true / false on success, negative on failure

 DESCRIPTION

    Quickly detect intersections with a block

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

htri_t

H5S__all_intersect_block(H5S_t H5_ATTR_UNUSED *space, const hsize_t H5_ATTR_UNUSED *start,

                         const hsize_t H5_ATTR_UNUSED *end)

{

    FUNC_ENTER_PACKAGE_NOERR

    /* Sanity check */

    assert(space);

    assert(H5S_SEL_ALL == H5S_GET_SELECT_TYPE(space));

    assert(start);

    assert(end);

    FUNC_LEAVE_NOAPI(true)

} /* end H5S__all_intersect_block() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_adjust_u

 PURPOSE

    Adjust an "all" selection by subtracting an offset

 USAGE

    herr_t H5S__all_adjust_u(space, offset)

        H5S_t *space;           IN/OUT: Pointer to dataspace to adjust

        const hsize_t *offset; IN: Offset to subtract

 RETURNS

    Non-negative on success, negative on failure

 DESCRIPTION

    Moves selection by subtracting an offset from it.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static herr_t

H5S__all_adjust_u(H5S_t H5_ATTR_UNUSED *space, const hsize_t H5_ATTR_UNUSED *offset)

{

    FUNC_ENTER_PACKAGE_NOERR

    /* Check args */

    assert(space);

    assert(offset);

    FUNC_LEAVE_NOAPI(SUCCEED)

} /* end H5S__all_adjust_u() */

/*--------------------------------------------------------------------------

 NAME

    H5S__all_adjust_s

 PURPOSE

    Adjust an "all" selection by subtracting an offset

 USAGE

    herr_t H5S__all_adjust_u(space, offset)

        H5S_t *space;           IN/OUT: Pointer to dataspace to adjust

        const hssize_t *offset; IN: Offset to subtract

 RETURNS

    Non-negative on success, negative on failure

 DESCRIPTION

    Moves selection by subtracting an offset from it.

 GLOBAL VARIABLES

 COMMENTS, BUGS, ASSUMPTIONS

 EXAMPLES

 REVISION LOG

--------------------------------------------------------------------------*/

static herr_t

H5S__all_adjust_s(H5S_t H5_ATTR_UNUSED *space, const hssize_t H5_ATTR_UNUSED *offset)

{