path: root/src/H5Spublic.h

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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 COPYING 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.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 * This file contains public declarations for the H5S module.
 */
#ifndef H5Spublic_H
#define H5Spublic_H

#include "H5public.h"  /* Generic Functions                        */
#include "H5Ipublic.h" /* Identifiers                              */

/* Define special dataspaces for dataset I/O operations */

/**
 * Used with @ref H5Dread and @ref H5Dwrite to indicate that the entire
 * dataspace will be selected. In the case of a file dataspace, this means
 * that the entire file dataspace, as defined by the dataset's dimensions,
 * will be selected. In the case of a memory dataspace, this means that
 * the specified file dataspace will also be used for the memory dataspace.
 * Used in place of a file or memory dataspace @ref hid_t value.
 */
#define H5S_ALL 0

/**
 * Indicates that the buffer provided in a call to @ref H5Dread or @ref H5Dwrite
 * is a single contiguous block of memory, with the same number of elements
 * as the file dataspace. Used in place of a memory dataspace @ref hid_t value.
 */
#define H5S_BLOCK 1

/**
 * Used with @ref H5Dread and @ref H5Dwrite to indicate that the file dataspace
 * selection was set via @ref H5Pset_dataset_io_hyperslab_selection calls.
 * Used in place of a file dataspace @ref hid_t value.
 */
#define H5S_PLIST 2

#define H5S_UNLIMITED HSIZE_UNDEF /**< Value for 'unlimited' dimensions */

/**
 * The maximum dataspace rank or number of dimensions
 */
#define H5S_MAX_RANK 32

/* Flags for selection iterators */
#define H5S_SEL_ITER_GET_SEQ_LIST_SORTED                                                                     \
    0x0001 /**< Retrieve elements from iterator in increasing offset order, for                              \
            * each call to retrieve sequences. Currently, this only applies to                               \
            * point selections, as hyperslab selections are always returned in                               \
            * increasing offset order. Note that the order is only increasing                                \
            * for each call to H5Sget_seq_list(), the next set of sequences                                  \
            * could start with an earlier offset than the previous one.                                      \
            */
#define H5S_SEL_ITER_SHARE_WITH_DATASPACE                                                                    \
    0x0002 /**< Don't copy the dataspace selection when creating the selection                               \
            * iterator. This can improve performance of creating the iterator,                               \
            * but the dataspace \Bold{MUST NOT} be modified or closed until the                              \
            * selection iterator is closed or the iterator's behavior will be                                \
            * undefined.                                                                                     \
            */

/**
 * Types of dataspaces
 */
typedef enum H5S_class_t {
    H5S_NO_CLASS = -1, /**< Error                                      */
    H5S_SCALAR   = 0,  /**< Singleton (scalar)                         */
    H5S_SIMPLE   = 1,  /**< Regular grid                               */
    H5S_NULL     = 2   /**< Empty set                                  */
} H5S_class_t;

/**
 * Different ways of combining selections
 */
typedef enum H5S_seloper_t {
    H5S_SELECT_NOOP = -1, /**< Error                                     */
    H5S_SELECT_SET  = 0,  /**< Select "set" operation 		             */
    H5S_SELECT_OR,        /**< Binary "or" operation for hyperslabs
                           * (add new selection to existing selection)
                           * \code
                           * Original region:  AAAAAAAAAA
                           * New region:             BBBBBBBBBB
                           * A or B:           CCCCCCCCCCCCCCCC
                           * \endcode
                           */
    H5S_SELECT_AND,       /**< Binary "and" operation for hyperslabs
                           * (only leave overlapped regions in selection)
                           * \code
                           * Original region:  AAAAAAAAAA
                           * New region:             BBBBBBBBBB
                           * A and B:                CCCC
                           * \endcode
                           */
    H5S_SELECT_XOR,       /**< Binary "xor" operation for hyperslabs
                           * (only leave non-overlapped regions in selection)
                           * \code
                           * Original region:  AAAAAAAAAA
                           * New region:             BBBBBBBBBB
                           * A xor B:          CCCCCC    CCCCCC
                           * \endcode
                           */
    H5S_SELECT_NOTB,      /**< Binary "not" operation for hyperslabs
                           * (only leave non-overlapped regions in original selection)
                           * \code
                           * Original region:  AAAAAAAAAA
                           * New region:             BBBBBBBBBB
                           * A not B:          CCCCCC
                           * \endcode
                           */
    H5S_SELECT_NOTA,      /**< Binary "not" operation for hyperslabs
                           * (only leave non-overlapped regions in new selection)
                           * \code
                           * Original region:  AAAAAAAAAA
                           * New region:             BBBBBBBBBB
                           * B not A:                    CCCCCC
                           * \endcode
                           */
    H5S_SELECT_APPEND,    /**< Append elements to end of point selection */
    H5S_SELECT_PREPEND,   /**< Prepend elements to beginning of point selection */
    H5S_SELECT_INVALID    /**< Invalid upper bound on selection operations */
} H5S_seloper_t;

/**
 * Selection type
 */
typedef enum {
    H5S_SEL_ERROR      = -1, /**< Error                                 */
    H5S_SEL_NONE       = 0,  /**< Empty selection                       */
    H5S_SEL_POINTS     = 1,  /**< Set of points                         */
    H5S_SEL_HYPERSLABS = 2,  /**< Hyperslab                             */
    H5S_SEL_ALL        = 3,  /**< Everything	                        */
    H5S_SEL_N                /**< Sentinel \internal THIS MUST BE LAST	*/
} H5S_sel_type;

#ifdef __cplusplus
extern "C" {
#endif

/* Operations on dataspaces, dataspace selections and selection iterators */

/**
 * \ingroup H5S
 *
 * \brief Releases and terminates access to a dataspace
 *
 * \space_id
 *
 * \return \herr_t
 *
 * \details H5Sclose() releases a dataspace. Further access through the
 *          dataspace identifier is illegal. Failure to release a dataspace with this
 *          call will result in resource leaks.
 *
 * \version 1.4.0 Fortran subroutine introduced in this release.
 * \since 1.0.0
 *
 */
H5_DLL herr_t H5Sclose(hid_t space_id);
/**
 * \ingroup H5S
 *
 * \brief Performs an operation on a hyperslab and an existing selection and
 *        returns the resulting selection
 *
 * \space_id
 * \param[in] op      Operation to perform on the current selection
 * \param[in] start   Offset of the start of of the hyperslab
 * \param[in] stride  Hyperslab stride
 * \param[in] count   Number of blocks included in the hyperslab
 * \param[in] block   Size of a block in the hyperslab
 *
 * \return \hid_tv{dataspace}
 *
 * \details H5Scombine_hyperslab() combines a hyperslab selection specified
 *          by \p start, \p stride, \p count and \p block with the current
 *          selection for the dataspace \p space_id, creating a new dataspace
 *          to return the generated selection.  If the current selection is
 *          not a hyperslab, it is freed and the hyperslab parameters passed
 *          in are combined with the #H5S_SEL_ALL hyperslab (ie. a selection
 *          composing the entire current extent). If either \p stride or
 *          \p block is NULL, then it will be set to \p 1.
 *
 * \since 1.10.6
 *
 */
H5_DLL hid_t H5Scombine_hyperslab(hid_t space_id, H5S_seloper_t op, const hsize_t start[],
                                  const hsize_t stride[], const hsize_t count[], const hsize_t block[]);
/**
 * \ingroup H5S
 *
 * \brief Combine two hyperslab selections with an operation, returning a
 *        dataspace with the resulting selection
 *
 * \space_id{space1_id}
 * \param[in] op  Selection operator
 * \space_id{space2_id}
 *
 * \return \hid_t{dataspace}
 *
 * \details H5Scombine_select() combines two hyperslab selections
 *          \p space1_id and \p space2_id with an operation, returning a
 *          new dataspace with the resulting selection. The dataspace extent
 *          from \p space1_id is copied for the dataspace extent of the
 *          newly created dataspace.
 *
 * \since 1.10.6
 *
 */
H5_DLL hid_t H5Scombine_select(hid_t space1_id, H5S_seloper_t op, hid_t space2_id);
/**
 * \ingroup H5S
 *
 * \brief Creates an exact copy of a dataspace
 *
 * \space_id
 *
 * \return \hid_tv{dataspace}
 *
 * \details H5Scopy() creates a new dataspace which is an exact copy of the
 *          dataspace identified by \p space_id. The dataspace identifier
 *          returned from this function should be released with H5Sclose()
 *          or resource leaks will occur.
 *
 * \version 1.4.0   Fortran subroutine introduced.
 * \since 1.0.0
 *
 */
H5_DLL hid_t H5Scopy(hid_t space_id);
/**
 * \ingroup H5S
 *
 * \brief Creates a new dataspace of a specified type
 *
 * \param[in] type   Type of dataspace to be created
 *
 * \return \hid_t{dataspace}
 *
 * \details H5Screate() creates a new dataspace of a particular type. Currently
 *          supported types are #H5S_SCALAR, #H5S_SIMPLE, and #H5S_NULL.
 *
 *          Further dataspace types may be added later.
 *
 *          A scalar dataspace, #H5S_SCALAR, has a single element, though that
 *          element may be of a complex datatype, such as a compound or array
 *          datatype. By convention, the rank of a scalar dataspace is always \p 0
 *          (zero); think of it geometrically as a single, dimensionless point,
 *          though that point can be complex.
 *
 *          A simple dataspace, #H5S_SIMPLE, consists of a regular array of elements.
 *
 *          A null dataspace, #H5S_NULL, has no data elements.
 *
 *          The dataspace identifier returned by this function can be released with
 *          H5Sclose() so that resource leaks will not occur.
 *
 * \version 1.4.0 Fortran subroutine introduced.
 * \since 1.0.0
 *
 */
H5_DLL hid_t H5Screate(H5S_class_t type);
/**
 * \ingroup H5S
 * \brief Creates a new simple dataspace and opens it for access
 *
 * \param[in] rank    Number of dimensions of dataspace
 * \param[in] dims    Array specifying the size of each dimension
 * \param[in] maxdims Array specifying the maximum size of each dimension
 *
 * \return \hid_t{dataspace}
 *
 * \details H5Screate_simple() creates a new simple dataspace and opens it
 *          for access, returning a dataspace identifier.
 *
 *          \p rank is the number of dimensions used in the dataspace.
 *
 *          \p dims is a one-dimensional array of size rank specifying the
 *          size of each dimension of the dataset. \p maxdims is an array of
 *          the same size specifying the upper limit on the size of each
 *          dimension.
 *
 *          Any element of \p dims can be \p 0 (zero). Note that no data can
 *          be written to a dataset if the size of any dimension of its current
 *          dataspace is \p 0. This is sometimes a useful initial state for
 *          a dataset.
 *
 *          \p maxdims may be the null pointer, in which case the upper limit
 *          is the same as \p dims. Otherwise, no element of \p maxdims
 *          should be smaller than the corresponding element of \p dims.
 *
 *          If an element of \p maxdims is #H5S_UNLIMITED, the maximum size of
 *          the corresponding dimension is unlimited.
 *
 *          Any dataset with an unlimited dimension must also be chunked; see
 *          H5Pset_chunk(). Similarly, a dataset must be chunked if \p dims
 *          does not equal \p maxdims.
 *
 *          The dataspace identifier returned from this function must be
 *          released with H5Sclose() or resource leaks will occur.
 *
 * \note Once a dataspace has been created, specific regions or elements in
 *       the dataspace can be selected and selections can be removed, as well.
 *       For example, H5Sselect_hyperslab() selects a region in a dataspace and
 *       H5Sselect_elements() selects array elements in a dataspace. These
 *       functions are used for subsetting. H5Sselect_none() removes all
 *       selections from a dataspace and is used in Parallel HDF5 when a process
 *       does not have or need to write data.
 *
 * \version 1.4.0 Fortran subroutine introduced.
 *
 * \since 1.0.0
 *
 */
H5_DLL hid_t H5Screate_simple(int rank, const hsize_t dims[], const hsize_t maxdims[]);
/**
 * \ingroup H5S
 *
 * \brief Decodes a binary object description of data space and returns a
 *        new object handle
 *
 * \param[in] buf  Buffer for the data space object to be decoded
 *
 * \return \hid_t{dataspace}
 *
 * \details Given an object description of a dataspace in binary in a
 *          buffer, H5Sdecode() reconstructs the HDF5 data type object and
 *          returns a new object handle for it. The binary description of the
 *          object is encoded by H5Sencode(). The user is responsible for
 *          passing in the right buffer. The types of dataspace addressed
 *          in this function are null, scalar, and simple space. For a
 *          simple dataspace, the selection information (for example,
 *          hyperslab selection) is also encoded and decoded. A complex
 *          dataspace has not been implemented in the library.
 *
 * \since 1.8.0
 *
 */
H5_DLL hid_t H5Sdecode(const void *buf);
/**
 * \ingroup H5S
 *
 * \brief Encodes a data space object description into a binary buffer
 *
 * \space_id{obj_id}
 * \param[in,out] buf      Buffer for the object to be encoded into;
 *                         If the provided buffer is NULL, only the size
 *                         of buffer needed is returned through \p nalloc.
 * \param[in,out] nalloc   The size of the allocated buffer
 * \fapl_id{fapl}
 *
 * \return \herr_t
 *
 * \details Given the data space identifier \p obj_id, H5Sencode2() converts
 *          a data space description into binary form in a buffer. Using this
 *          binary form in the buffer, a data space object can be
 *          reconstructed with H5Sdecode() to return a new object handle
 *          (#hid_t) for this data space.
 *
 *          A preliminary H5Sencode2() call can be made to determine the
 *          size of the buffer needed. This value is returned in \p nalloc.
 *          That value can then be assigned to \p nalloc for a second
 *          H5Sencode2() call, which will retrieve the actual encoded object.
 *
 *          If the library determines that \p nalloc is not big enough for the
 *          object, it simply returns the size of the buffer needed through
 *          \p nalloc without encoding the provided buffer.
 *
 *          The file access property list \p fapl_id is used to control the
 *          encoding via the \a libver_bounds property (see
 *          H5Pset_libver_bounds()). If the \a libver_bounds property is missing,
 *          H5Sencode2() proceeds as if the \a libver_bounds property were set to
 *          (#H5F_LIBVER_EARLIEST, #H5F_LIBVER_LATEST). (Functionally,
 *          H5Sencode1() is identical to H5Sencode2() with \a libver_bounds set to
 *          (#H5F_LIBVER_EARLIEST, #H5F_LIBVER_LATEST).)
 *
 *          The types of data space that are addressed in this function are
 *          null, scalar, and simple space. For a simple data space, the
 *          information on the selection, for example, hyperslab selection,
 *          is also encoded and decoded. A complex data space has not been
 *          implemented in the library.
 *
 * \note Motivation: This function was introduced in HDF5-1.12 as part of the
 *       H5Sencode() format change to enable 64-bit selection encodings and
 *       a dataspace selection that is tied to a file. See the \ref_news_112
 *       as well as the \ref_sencode_fmt_change.
 *
 * \since 1.12.0
 *
 */
H5_DLL herr_t H5Sencode2(hid_t obj_id, void *buf, size_t *nalloc, hid_t fapl);
/**
 * \ingroup H5S
 *
 * \brief Copies the extent of a dataspace
 *
 * \space_id{dst_id}
 * \space_id{src_id}
 *
 * \return \herr_t
 *
 * \details H5Sextent_copy() copies the extent from \p src_id to \p dst_id.
 *          This action may change the type of the dataspace.
 *
 * \version 1.4.0 Fortran subroutine was introduced.
 * \since 1.0.0
 *
 */
H5_DLL herr_t H5Sextent_copy(hid_t dst_id, hid_t src_id);
/**
 * \ingroup H5S
 *
 * \brief Determines whether two dataspace extents are equal
 *
 * \space_id{space1_id}
 * \space_id{space2_id}
 *
 * \return \htri_t
 *
 * \details H5Sextent_equal() determines whether the dataspace extents of
 *          two dataspaces, \p space1_id and \p space2_id, are equal.
 *
 * \since 1.8.0
 *
 */
H5_DLL htri_t H5Sextent_equal(hid_t space1_id, hid_t space2_id);
/**
 * \ingroup H5S
 *
 * \brief Retrieves a regular hyperslab selection
 *
 * \space_id{spaceid}
 * \param[out] start   Offset of the start of the regular hyperslab
 * \param[out] stride  Stride of the regular hyperslab
 * \param[out] count   Number of blocks in the regular hyperslab
 * \param[out] block   Size of a block in the regular hyperslab
 *
 * \return \herr_t
 *
 * \details H5Sget_regular_hyperslab() takes the dataspace identifier,
 *          \p spaceid, and retrieves the values of \p start, \p stride,
 *          \p count, and \p block for the regular hyperslab selection.
 *
 *          A regular hyperslab selection is a hyperslab selection
 *          described by setting the \p offset, \p stride, \p count, and
 *          \p block parameters to the H5Sselect_hyperslab() call. If
 *          several calls to H5Sselect_hyperslab() are needed, the
 *          hyperslab selection is irregular.
 *
 *          See H5Sselect_hyperslab() for descriptions of \p offset,
 *          \p stride, \p count, and \p block.
 *
 * \note If a hyperslab selection is originally regular, then becomes
 *       irregular through selection operations, and then becomes regular
 *       again, the final regular selection may be equivalent but not
 *       identical to the original regular selection.
 *
 * \since 1.10.0
 *
 */
H5_DLL htri_t H5Sget_regular_hyperslab(hid_t spaceid, hsize_t start[], hsize_t stride[], hsize_t count[],
                                       hsize_t block[]);
/**
 * \ingroup H5S
 *
 * \brief Gets the bounding box containing the current selection
 *
 * \space_id{spaceid}
 * \param[out] start  Starting coordinates of the bounding box
 * \param[out] end    Ending coordinates of the bounding box, i.e., the
 *                    coordinates of the diagonally opposite corner
 *
 * \return \herr_t
 *
 * \details H5Sget_select_bounds() retrieves the coordinates of the bounding
 *          box containing the current selection and places them into
 *          user-supplied buffers.
 *
 *          The \p start and \p end buffers must be large enough to hold
 *          the dataspace rank number of coordinates.
 *
 *          The bounding box exactly contains the selection. I.e., if a
 *          2-dimensional element selection is currently defined as containing
 *          the points (4,5), (6,8), and (10,7), then the bounding box
 *          will be (4, 5), (10, 8).
 *
 *          The bounding box calculation includes the current offset of the
 *          selection within the dataspace extent.
 *
 *          Calling this function on a \a none selection will fail.
 *
 * \version 1.6.0 The \p start and \p end parameters have changed from type
 *          \p hsize_t * to \p hssize_t *.
 * \version 1.4.0 Fortran subroutine was introduced.
 * \since 1.2.0
 *
 */
H5_DLL herr_t H5Sget_select_bounds(hid_t spaceid, hsize_t start[], hsize_t end[]);
/**
 * \ingroup H5S
 *
 * \brief Gets the number of element points in the current selection
 *
 * \space_id{spaceid}
 *
 * \return Returns the number of element points in the current dataspace
 *         selection if successful. Otherwise returns a negative value.
 *
 * \details H5Sget_select_elem_npoints() returns the number of element
 *          points in the current dataspace selection, so that the element
 *          points can be retrieved with H5Sget_select_elem_pointlist().
 *          (This is similar to the way that H5Sget_select_hyper_nblocks()
 *          and H5Sget_select_hyper_blocklist() work with hyperslab
 *          selections.)
 *
 *          Coincidentally, H5Sget_select_npoints() and
 *          H5Sget_select_elem_npoints() will always return the same value
 *          when an element selection is queried, but
 *          H5Sget_select_elem_npoints() does not work with other selection
 *          types.
 *
 * \since 1.2.0
 *
 */
H5_DLL hssize_t H5Sget_select_elem_npoints(hid_t spaceid);
/**
 * \ingroup H5S
 *
 * \brief Gets the list of element points currently selected
 *
 * \space_id{spaceid}
 * \param[in] startpoint  Element point to start with
 * \param[in] numpoints   Number of element points to get
 * \param[out] buf        List of element points selected
 *
 * \details H5Sget_select_elem_pointlist() returns the list of element
 *          points in the current dataspace selection \p space_id. Starting
 *          with the \p startpoint in the list of points, \p numpoints
 *          points are put into the user's buffer. If the user's buffer
 *          fills up before \p numpoints points are inserted, the buffer
 *          will contain only as many points as fit.
 *
 *          The element point coordinates have the same dimensionality
 *          (rank) as the dataspace they are located within. The list of
 *          element points is formatted as follows:\n
 *              \<coordinate\>, followed by\n
 *              the next coordinate,\n
 *              etc.\n
 *          until all of the selected element points have been listed.
 *
 *          The points are returned in the order they will be iterated
 *          through when the selection is read/written from/to disk.
 *
 * \since 1.2.0
 *
 */
H5_DLL herr_t H5Sget_select_elem_pointlist(hid_t spaceid, hsize_t startpoint, hsize_t numpoints,
                                           hsize_t buf[/*numpoints*/]);
/**
 * \ingroup H5S
 *
 * \brief Gets the list of hyperslab blocks currently selected
 *
 * \space_id{spaceid}
 * \param[in]  startblock  Hyperslab block to start with
 * \param[in]  numblocks   Number of hyperslab blocks to get
 * \param[out] buf         List of hyperslab blocks selected
 *
 * \return \herr_t
 *
 * \details H5Sget_select_hyper_blocklist() returns a list of the hyperslab
 *          blocks currently selected. Starting with the \p startblock-th block
 *          in the list of blocks, \p numblocks blocks are put into the
 *          user's buffer. If the user's buffer fills up before \p numblocks
 *          blocks are inserted, the buffer will contain only as many blocks
 *          as fit.
 *
 *          The block coordinates have the same dimensionality (rank) as the
 *          dataspace they are located within. The list of blocks is
 *          formatted as follows:\n
 *              \<"start" coordinate\>, immediately followed by\n
 *              \<"opposite" corner coordinate\>, followed by\n
 *              the next "start" and "opposite" coordinates,\n
 *              etc. until all of the selected blocks have been listed.\n
 *          No guarantee of any order of the blocks is implied.
 *
 * \since 1.2.0
 *
 */
H5_DLL herr_t H5Sget_select_hyper_blocklist(hid_t spaceid, hsize_t startblock, hsize_t numblocks,
                                            hsize_t buf[/*numblocks*/]);
/**
 * \ingroup H5S
 *
 * \brief Get number of hyperslab blocks
 *
 * \space_id{spaceid}
 *
 * \return Returns the number of hyperslab blocks in the current dataspace
 *         selection if successful. Otherwise returns a negative value.
 *
 * \details H5Sget_select_hyper_nblocks() returns the number of hyperslab
 *          blocks in the current dataspace selection.
 *
 * \since 1.2.0
 *
 */
H5_DLL hssize_t H5Sget_select_hyper_nblocks(hid_t spaceid);
/**
 * \ingroup H5S
 *
 * \brief Determines the number of elements in a dataspace selection
 *
 * \space_id{spaceid}
 *
 * \return Returns the number of elements in the selection if successful;
 *         otherwise returns a negative value.
 *
 * \details H5Sget_select_npoints() determines the number of elements in
 *          the current selection of a dataspace. It works with any
 *          selection type, and is the correct way to retrieve the number
 *          of elements in a selection.
 *
 * \version 1.4.0 Fortran subroutine introduced in this release.
 * \since 1.0.0
 *
 */
H5_DLL hssize_t H5Sget_select_npoints(hid_t spaceid);
/**
 * \ingroup H5S
 *
 * \brief Determines the type of the dataspace selection
 *
 * \space_id{spaceid}
 *
 * \return Returns the dataspace selection type, a value of the enumerated
 *         datatype #H5S_sel_type, if successful.
 *
 * \details H5Sget_select_type() retrieves the type of dataspace selection
 *          currently defined for the dataspace \p space_id. Valid values
 *          for the dataspace selection type are:
 *
 *         <table>
 *           <tr>
 *             <td>#H5S_SEL_NONE</td>
 *             <td>No selection is defined</td>
 *           </tr>
 *           <tr>
 *             <td>#H5S_SEL_POINTS</td>
 *             <td>A sequence of points is selected</td>
 *           </tr>
 *           <tr>
 *             <td>#H5S_SEL_HYPERSLABS</td>
 *             <td>A hyperslab or compound hyperslab is selected</td>
 *           </tr>
 *           <tr>
 *             <td>#H5S_SEL_ALL</td>
 *             <td>The entire dataset is selected</td>
 *           </tr>
 *         </table>
 *
 *         Otherwise returns a negative value.
 *
 * \since 1.6.0
 *
 */
H5_DLL H5S_sel_type H5Sget_select_type(hid_t spaceid);
/**
 * \ingroup H5S
 *
 * \brief Retrieves dataspace dimension size and maximum size
 *
 * \space_id
 * \param[out] dims Pointer to array to store the size of each dimension
 * \param[out] maxdims Pointer to array to store the maximum size of each
 *                     dimension
 *
 * \return Returns the number of dimensions in the dataspace if successful;
 *         otherwise returns a negative value.
 *
 * \details H5Sget_simple_extent_dims() returns the size and maximum sizes
 *          of each dimension of a dataspace \p space_id through the \p dims
 *          and \p maxdims parameters.
 *
 *          Either or both of \p dims and \p maxdims may be NULL.
 *
 *          If a value in the returned array \p maxdims is #H5S_UNLIMITED (-1),
 *          the maximum size of that dimension is unlimited.
 *
 * \version 1.4.0 Fortran subroutine introduced.
 * \since 1.0.0
 *
 */
H5_DLL int H5Sget_simple_extent_dims(hid_t space_id, hsize_t dims[], hsize_t maxdims[]);
/**
 * \ingroup H5S
 *
 * \brief Determines the dimensionality of a dataspace
 *
 * \space_id
 *
 * \return Returns the number of dimensions in the dataspace if successful;
 *         otherwise returns a negative value.
 *
 * \details H5Sget_simple_extent_ndims() determines the dimensionality (or
 *          rank) of a dataspace.
 *
 * \version 1.4.0 Fortran subroutine introduced.
 * \since 1.0.0
 *
 */
H5_DLL int H5Sget_simple_extent_ndims(hid_t space_id);
/**
 * \ingroup H5S
 *
 * \brief Determines the number of elements in a dataspace
 *
 * \space_id
 *
 * \return Returns the number of elements in the dataspace if successful;
 *         otherwise returns a negative value.
 *
 * \details H5Sget_simple_extent_npoints() determines the number of elements
 *          in a dataspace \p space_id. For example, a simple 3-dimensional
 *          dataspace with dimensions 2, 3, and 4 would have 24 elements.
 *
 * \version 1.4.0 Fortran subroutine introduced.
 * \since 1.0.0
 *
 */
H5_DLL hssize_t H5Sget_simple_extent_npoints(hid_t space_id);
/**
 * \ingroup H5S
 *
 * \brief  Determines the current class of a dataspace
 *
 * \space_id
 *
 * \return Returns a dataspace class name if successful;
 *         otherwise #H5S_NO_CLASS (-1).
 *
 * \details H5Sget_simple_extent_type() determines the current class of a
 *          dataspace \p space_id.
 *
 * \version 1.4.0 Fortran subroutine was introduced.
 * \since 1.0.0
 *
 */
H5_DLL H5S_class_t H5Sget_simple_extent_type(hid_t space_id);
/**
 * \ingroup H5S
 *
 * \brief Determines if a hyperslab selection is regular
 *
 * \space_id{spaceid}
 *
 * \return \htri_t
 *
 * \details H5Sis_regular_hyperslab() takes the dataspace identifier,
 *          \p spaceid, and queries the type of the hyperslab selection.
 *
 *          A regular hyperslab selection is a hyperslab selection described
 *          by setting the offset, stride, count, and block parameters for
 *          a single H5Sselect_hyperslab() call. If several calls to
 *          H5Sselect_hyperslab() are needed, then the hyperslab selection
 *          is irregular.
 *
 * \since 1.10.0
 *
 */
H5_DLL htri_t H5Sis_regular_hyperslab(hid_t spaceid);
/**
 * \ingroup H5S
 *
 * \brief Determines whether a dataspace is a simple dataspace
 *
 * \space_id
 *
 * \return \htri_t
 *
 * \details H5Sis_simple() determines whether or not a dataspace is a simple
 *          dataspace.
 *
 * \note Currently, all dataspace objects are simple dataspaces; complex
 *       dataspace support will be added in the future.
 *
 * \version 1.4.0 Fortran subroutine was introduced.
 * \since 1.0.0
 *
 */
H5_DLL htri_t H5Sis_simple(hid_t space_id);
/**
 * \ingroup H5S
 *
 * \brief Refines a hyperslab selection with an operation, using a second
 *        hyperslab to modify it
 *
 * \space_id{space1_id}
 * \param[in] op  Selection operator
 * \space_id{space2_id}
 *
 * \return \herr_t
 *
 * \details H5Smodify_select() refines an existing hyperslab selection
 *          \p space1_id with an operation \p op, using a second hyperslab
 *          \p space2_id. The first selection is modified to contain the
 *          result of \p space1_id operated on by \p space2_id.
 *
 * \since 1.10.6
 *
 */
H5_DLL herr_t H5Smodify_select(hid_t space1_id, H5S_seloper_t op, hid_t space2_id);
/**
 * \ingroup H5S
 *
 * \brief Sets the offset of a simple dataspace
 *
 * \space_id
 * \param[in] offset  The offset at which to position the selection
 *
 * \return \herr_t
 *
 * \details H5Soffset_simple() sets the offset of a simple dataspace
 *          \p space_id. The offset array must be the same number of
 *          elements as the number of dimensions for the dataspace. If the
 *          \p offset array is set to NULL, the offset for the dataspace is
 *          reset to 0.
 *
 *          This function allows the same shaped selection to be moved to
 *          different locations within a dataspace without requiring it to
 *          be redefined.
 *
 * \version 1.4.0 Fortran subroutine was introduced.
 * \since 1.0.0
 *
 */
H5_DLL herr_t H5Soffset_simple(hid_t space_id, const hssize_t *offset);
/**
 * \ingroup H5S
 *
 * \brief Closes a dataspace selection iterator
 *
 * \space_id{sel_iter_id}
 *
 * \return \herr_t
 *
 * \details H5Ssel_iter_close() closes a dataspace selection iterator
 *          specified by \p sel_iter_id, releasing its state.
 *
 * \since 1.12.0
 *
 */
H5_DLL herr_t H5Ssel_iter_close(hid_t sel_iter_id);
/**\ingroup H5S
 *
 * \brief Creates a dataspace selection iterator for a dataspace's selection
 *
 * \space_id{spaceid}
 * \param[in] elmt_size  Size of element in the selection
 * \param[in] flags      Selection iterator flag
 *
 * \return \hid_t{valid dataspace selection iterator}
 *
 * \details H5Ssel_iter_create() creates a selection iterator and initializes
 *          it to start at the first element selected in the dataspace.
 *
 * \since 1.12.0
 *
 */
H5_DLL hid_t H5Ssel_iter_create(hid_t spaceid, size_t elmt_size, unsigned flags);
/**
 * \ingroup H5S
 *
 * \brief Retrieves a list of offset / length sequences for the elements in
 *        an iterator
 *
 * \space_id{sel_iter_id}
 * \param[in]  maxseq   Maximum number of sequences to retrieve
 * \param[in]  maxelmts Maximum number of elements to retrieve in sequences
 * \param[out] nseq     Number of sequences retrieved
 * \param[out] nelmts   Number of elements retrieved, in all sequences
 * \param[out] off      Array of sequence offsets
 * \param[out] len      Array of sequence lengths
 *
 * \return \herr_t
 *
 * \details H5Ssel_iter_get_seq_list() retrieves a list of offset / length
 *          pairs (a list of "sequences") matching the selected elements for
 *          an iterator \p sel_iter_id, according to the iteration order for
 *          the iterator.  The lengths returned are in bytes, not elements.
 *
 *          Note that the iteration order for "all" and "hyperslab"
 *          selections is row-major (i.e. "C-ordered"), but the iteration
 *          order for "point" selections is "in order selected", unless the
 *          #H5S_SEL_ITER_GET_SEQ_LIST_SORTED flag is passed to
 *          H5Ssel_iter_create() for a point selection.
 *
 *          \p maxseq and \p maxelmts specify the most sequences or elements
 *          possible to place into the \p off and \p len arrays. \p nseq and
 *          \p nelmts return the actual number of sequences and elements put
 *          into the arrays.
 *
 *          Each call to H5Ssel_iter_get_seq_list() will retrieve the next
 *          set of sequences for the selection being iterated over.
 *
 *          The total number of bytes possible to retrieve from a selection
 *          iterator is the \p elmt_size passed to H5Ssel_iter_create()
 *          multiplied by the number of elements selected in the dataspace
 *          the iterator was created from (which can be retrieved with
 *          H5Sget_select_npoints().  When there are no further sequences of
 *          elements to retrieve, calls to this routine will set \p nseq
 *          and \p nelmts to zero.
 *
 * \since 1.12.0
 *
 */
H5_DLL herr_t H5Ssel_iter_get_seq_list(hid_t sel_iter_id, size_t maxseq, size_t maxelmts, size_t *nseq,
                                       size_t *nelmts, hsize_t *off, size_t *len);
/**
 * \ingroup H5S
 *
 * \brief  Resets a dataspace selection iterator back to an initial state
 *
 * \param[in] sel_iter_id   Identifier of the dataspace selection iterator
 *                          to reset
 * \param[in] space_id      Identifier of the dataspace with selection to
 *                          iterate over
 *
 * \return \herr_t
 *
 * \details H5Ssel_iter_reset() resets a dataspace selection iterator back to
 *          an initial state so that the iterator may be used for iteration
 *          once again.
 *
 * \since 1.12.1
 *
 */
H5_DLL herr_t H5Ssel_iter_reset(hid_t sel_iter_id, hid_t space_id);
/**
 * \ingroup H5S
 *
 * \brief Adjusts a selection by subtracting an offset
 *
 * \space_id{spaceid}
 * \param[in] offset  Offset to subtract
 *
 * \return \herr_t
 *
 * \details H5Sselect_adjust() shifts a dataspace selection by a specified
 *          logical offset within the dataspace extent.
 *
 * \note This can be useful for VOL developers to implement chunked datasets.
 *
 * \since 1.10.6
 */
H5_DLL herr_t H5Sselect_adjust(hid_t spaceid, const hssize_t *offset);
/**
 * \ingroup H5S
 *
 * \brief Selects an entire dataspace
 *
 * \space_id{spaceid}
 *
 * \return \herr_t
 *
 * \details H5Sselect_all() selects the entire extent of the dataspace
 *          \p dspace_id.
 *
 *          More specifically, H5Sselect_all() sets the selection type to
 *          #H5S_SEL_ALL, which specifies the entire dataspace anywhere it
 *          is applied.
 *
 * \since 1.0.0
 *
 */
H5_DLL herr_t H5Sselect_all(hid_t spaceid);
/**
 * \ingroup H5S
 *
 * \brief Copies a selection from one dataspace to another
 *
 * \space_id{dst_id}
 * \space_id{src_id}
 *
 * \return \herr_t
 *
 * \details H5Sselect_copy() copies all selection information (including
 *          offset) from the source dataspace \p src_id to the destination
 *          dataspace \p dst_id.
 *
 * \since 1.10.6
 *
 */
H5_DLL herr_t H5Sselect_copy(hid_t dst_id, hid_t src_id);
/**
 * \ingroup H5S
 *
 * \brief Selects array elements to be included in the selection for a
 *        dataspace
 *
 * \space_id
 * \param[in] op  Operator specifying how the new selection is to be
 *                combined with the existing selection for the dataspace
 * \param[in] num_elem  Number of elements to be selected
 * \param[in] coord  A pointer to a buffer containing a serialized copy of
 *                   a 2-dimensional array of zero-based values specifying
 *                   the coordinates of the elements in the point selection
 *
 * \return \herr_t
 *
 * \details H5Sselect_elements() selects array elements to be included in
 *          the selection for the \p space_id dataspace. This is referred
 *          to as a point selection.
 *
 *          The number of elements selected is set in the \p num_elements
 *          parameter.
 *
 *          The \p coord parameter is a pointer to a buffer containing a
 *          serialized 2-dimensional array of size \p num_elements by the
 *          rank of the dataspace. The array lists dataset elements in the
 *          point selection; that is, it's a list of zero-based values
 *          specifying the coordinates in the dataset of the selected
 *          elements. The order of the element coordinates in the \p coord
 *          array specifies the order in which the array elements are
 *          iterated through when I/O is performed. Duplicate coordinate
 *          locations are not checked for. See below for examples of the
 *          mapping between the serialized contents of the buffer and the
 *          point selection array that it represents.
 *
 *          The selection operator \p op determines how the new selection
 *          is to be combined with the previously existing selection for
 *          the dataspace. The following operators are supported:
 *
 *          <table>
 *           <tr>
 *             <td>#H5S_SELECT_SET</td>
 *             <td>Replaces the existing selection with the parameters from
 *                 this call. Overlapping blocks are not supported with this
 *                 operator. Adds the new selection to the existing selection.
 *                 </td>
 *           </tr>
 *           <tr>
 *             <td>#H5S_SELECT_APPEND</td>
 *             <td>Adds the new selection following the last element of the
 *                 existing selection.</td>
 *           </tr>
 *           <tr>
 *              <td>#H5S_SELECT_PREPEND</td>
 *              <td>Adds the new selection preceding the first element of the
 *                  existing selection.</td>
 *           </tr>
 *          </table>
 *
 *          <b>Mapping the serialized \p coord buffer to a 2-dimensional
 *          point selection array:</b>
 *          To illustrate the construction of the contents of the \p coord
 *          buffer, consider two simple examples: a selection of 5 points in
 *          a 1-dimensional array and a selection of 3 points in a
 *          4-dimensional array.
 *
 *          In the 1D case, we will be selecting five points and a 1D
 *          dataspace has rank 1, so the selection will be described in a
 *          5-by-1 array. To select the 1st, 14th, 17th, 23rd and 8th elements
 *          of the dataset, the selection array would be as follows
 *          (remembering that point coordinates are zero-based):
 *          \n      0
 *          \n     13
 *          \n     16
 *          \n     22
 *          \n      7
 *
 *          This point selection array will be serialized in the \p coord
 *          buffer as:
 *          \n      0 13 16 22 7
 *
 *          In the 4D case, we will be selecting three points and a 4D
 *          dataspace has rank 4, so the selection will be described in a
 *          3-by-4 array. To select the points (1,1,1,1), (14,6,12,18), and
 *          (8,22,30,22), the point selection array would be as follows:
 *          \n      0  0  0  0
 *          \n     13  5 11 17
 *          \n      7 21 29 21
 *
 *          This point selection array will be serialized in the \p coord
 *          buffer as:
 *          \n      0 0 0 0 13 5 11 17 7 21 29 21
 *
 * \version 1.6.4 C coord parameter type changed to \p const hsize_t.
 * \version 1.6.4 Fortran \p coord parameter type changed to \p INTEGER(HSIZE_T).
 * \since 1.0.0
 *
 */
H5_DLL herr_t H5Sselect_elements(hid_t space_id, H5S_seloper_t op, size_t num_elem, const hsize_t *coord);
/**
 * \ingroup H5S
 *
 * \brief Selects a hyperslab region to add to the current selected region
 *
 * \space_id
 * \param[in] op     Operation to perform on current selection
 * \param[in] start  Offset of start of hyperslab
 * \param[in] stride Hyperslab stride
 * \param[in] count  Number of blocks included in hyperslab
 * \param[in] block  Size of block in hyperslab
 *
 * \return \herr_t
 *
 * \details H5Sselect_hyperslab() selects a hyperslab region to add to the
 *          current selected region for the dataspace specified by
 *          \p space_id.
 *
 *          The \p start, \p stride, \p count, and \p block arrays must be the
 *          same size as the rank of the dataspace. For example, if the
 *          dataspace is 4-dimensional, each of these parameters must be a
 *          1-dimensional array of size 4.
 *
 *          The selection operator \p op determines how the new selection
 *          is to be combined with the already existing selection for the
 *          dataspace. The following operators are supported:
 *
 *          <table>
 *           <tr>
 *             <td>#H5S_SELECT_SET</td>
 *             <td>Replaces the existing selection with the
 *              parameters from this call. Overlapping blocks
 *             are not supported with this operator.</td>
 *           </tr>
 *           <tr>
 *              <td>#H5S_SELECT_OR</td>
 *              <td>Adds the new selection to the existing selection.
 *              (Binary OR)</td>
 *           </tr>
 *           <tr>
 *             <td>#H5S_SELECT_AND</td>
 *             <td>Retains only the overlapping portions of the
 *                new selection and the existing selection.
 *               (Binary AND)</td>
 *          </tr>
 *          <tr>
 *             <td>#H5S_SELECT_XOR</td>
 *             <td>Retains only the elements that are members of
 *                  the new selection or the existing selection,
 *                  excluding elements that are members of both
 *                  selections. (Binary exclusive-OR, XOR)
 *                 </td>
 *          </tr>
 *          <tr>
 *             <td>#H5S_SELECT_NOTB</td>
 *             <td>Retains only elements of the existing selection
 *               that are not in the new selection.</td>
 *          </tr>
 *          <tr>
 *             <td>#H5S_SELECT_NOTA</td>
 *             <td>Retains only elements of the new selection that
 *              are not in the existing selection.</td>
 *          </tr>
 *          </table>
 *
 *          The \p start array specifies the offset of the starting element
 *          of the specified hyperslab.
 *
 *          The \p stride array chooses array locations from the dataspace with
 *          each value in the \p stride array determining how many elements to
 *          move in each dimension. Setting a value in the \p stride array to
 *          \p 1 moves to each element in that dimension of the dataspace;
 *          setting a value of \p 2 in allocation in the \p stride array moves
 *          to every other element in that dimension of the dataspace. In
 *          other words, the \p stride determines the number of elements to
 *          move from the \p start location in each dimension. Stride values
 *          of \p 0 are not allowed. If the \p stride parameter is NULL, a
 *          contiguous hyperslab is selected (as if each value in the \p stride
 *          array were set to \p 1).
 *
 *          The \p count array determines how many blocks to select from the
 *          dataspace, in each dimension.
 *
 *          The \p block array determines the size of the element block
 *          selected from the dataspace. If the \p block parameter is set to
 *          NULL, the block size defaults to a single element in each dimension
 *          (as if each value in the \p block array were set to \p 1).
 *
 *          For example, consider a 2-dimensional dataspace with hyperslab
 *          selection settings as follows: the \p start offset is specified as
 *          [1,1], \p stride is [4,4], \p count is [3,7], and \p block is [2,2].
 *          In C, these settings will specify a hyperslab consisting of 21
 *          2x2 blocks of array elements starting with location (1,1) with the
 *          selected blocks at locations (1,1), (5,1), (9,1), (1,5), (5,5), etc.;
 *          in Fortran, they will specify a hyperslab consisting of 21 2x2
 *          blocks of array elements starting with location (2,2), since \p start
 *          is 0-based indexed, with the selected blocks at
 *          locations (2,2), (6,2), (10,2), (2,6), (6,6), etc.
 *
 *          Regions selected with this function call default to C order
 *          iteration when I/O is performed.
 *
 * \version 1.4.0 Fortran subroutine introduced in this release.
 * \since 1.0.0
 *
 */
H5_DLL herr_t H5Sselect_hyperslab(hid_t space_id, H5S_seloper_t op, const hsize_t start[],
                                  const hsize_t stride[], const hsize_t count[], const hsize_t block[]);
/*--------------------------------------------------------------------------*/
/**\ingroup H5S
 *
 * \brief Checks if current selection intersects with a block
 *
 * \space_id
 * \param[in] start  Starting coordinate of block
 * \param[in] end    Opposite ("ending") coordinate of block
 *
 * \return \htri_t
 *
 * \details H5Sselect_intersect_block() checks to see if the current
 *          selection \p space_id in the dataspace intersects with the block
 *          specified by \p start and \p end.
 *
 * \note Assumes that \p start & \p end block bounds are inclusive, so
 *       \p start == \p end value is OK.
 *
 * \since 1.10.6
 *
 */
H5_DLL htri_t H5Sselect_intersect_block(hid_t space_id, const hsize_t *start, const hsize_t *end);
/*--------------------------------------------------------------------------*/
/**\ingroup H5S
 *
 * \brief Resets the selection region to include no elements
 *
 * \space_id{spaceid}
 *
 * \return \herr_t
 *
 * \details H5Sselect_none() resets the selection region for the dataspace
 *          \p space_id to include no elements.
 *
 * \since 1.0.0
 *
 */
H5_DLL herr_t H5Sselect_none(hid_t spaceid);
/*--------------------------------------------------------------------------*/
/**\ingroup H5S
 *
 * \brief Projects the intersection of two source selections to a
 *        destination selection
 *
 * \space_id{src_space_id}
 * \space_id{dst_space_id}
 * \space_id{src_intersect_space_id}
 *
 * \return Returns a dataspace with a selection equal to the intersection of
 *         \p src_intersect_space_id and \p src_space_id projected from
 *         \p src_space to \p dst_space on success, negative on failure.
 *
 * \details H5Sselect_project_intersection() computes the intersection
 *          between two dataspace selections and projects that intersection
 *          into a third selection.This can be useful for VOL developers to
 *          implement chunked or virtual datasets.
 *
 * \since 1.10.6
 *
 */
H5_DLL hid_t H5Sselect_project_intersection(hid_t src_space_id, hid_t dst_space_id,
                                            hid_t src_intersect_space_id);
/*--------------------------------------------------------------------------*/
/**\ingroup H5S
 *
 * \brief Checks if two selections are the same shape
 *
 * \space_id{space1_id}
 * \space_id{space2_id}
 *
 * \return \htri_t
 *
 * \details H5Sselect_shape_same() checks to see if the current selection
 *          in the dataspaces are the same dimensionality and shape.
 *
 *          This is primarily used for reading the entire selection in
 *          one swoop.
 *
 * \since 1.10.6
 *
 */
H5_DLL htri_t H5Sselect_shape_same(hid_t space1_id, hid_t space2_id);
/*--------------------------------------------------------------------------*/
/**\ingroup H5S
 *
 * \brief Verifies that the selection is within the extent of the dataspace
 *
 * \space_id{spaceid}
 *
 * \return \htri_t
 *
 * \details H5Sselect_valid() verifies that the selection for the dataspace
 *          \p space_id is within the extent of the dataspace if the current
 *          offset for the dataspace is used.
 *
 * \version 1.4.0 Fortran subroutine introduced in this release.
 * \since 1.0.0
 *
 */
H5_DLL htri_t H5Sselect_valid(hid_t spaceid);
/*--------------------------------------------------------------------------*/
/**\ingroup H5S
 *
 * \brief Resets the extent of a dataspace back to "none"
 *
 * \space_id
 *
 * \return  \herr_t
 *
 * \details H5Sset_extent_none() resets the type of a dataspace to
 *          #H5S_NULL with no extent information stored for the dataspace.
 *
 * \version 1.10.7, 1.12.1  The function behavior changed. The previous
 *                          behavior was to set the class to #H5S_NO_CLASS.
 * \version 1.4.0           Fortran subroutine was introduced.
 * \since 1.0.0
 *
 */
H5_DLL herr_t H5Sset_extent_none(hid_t space_id);
/*--------------------------------------------------------------------------*/
/**\ingroup H5S
 *
 * \brief Sets or resets the size of an existing dataspace
 *
 * \space_id
 * \param[in] rank   Rank, or dimensionality, of the dataspace
 * \param[in] dims   Array containing current size of dataspace
 * \param[in] max    Array containing maximum size of dataspace
 *
 * \return \herr_t
 *
 * \details H5Sset_extent_simple() sets or resets the size of an existing
 *          dataspace.
 *
 *          \p dims is an array of size \p rank that contains the new size
 *          of each dimension in the dataspace. \p max is an array of size
 *          \p rank that contains the maximum size of each dimension in
 *          the dataspace.
 *
 *          Any previous extent is removed from the dataspace, the dataspace
 *          type is set to #H5S_SIMPLE, and the extent is set as specified.
 *
 * \version 1.4.0 Fortran subroutine was introduced.
 * \since 1.0.0
 *
 */
H5_DLL herr_t H5Sset_extent_simple(hid_t space_id, int rank, const hsize_t dims[], const hsize_t max[]);

/* Symbols defined for compatibility with previous versions of the HDF5 API.
 *
 * Use of these symbols is deprecated.
 */
#ifndef H5_NO_DEPRECATED_SYMBOLS
/* Function prototypes */
/* --------------------------------------------------------------------------*/
/**\ingroup H5S
 *
 * \brief Encodes a data space object description into a binary buffer
 *
 * \space_id{obj_id}
 * \param[in,out] buf     Buffer for the object to be encoded into;
 *                        If the provided buffer is NULL, only the size of
 *                        buffer needed is returned through \p nalloc.
 * \param[in,out] nalloc  The size of the allocated buffer
 *
 * \return \herr_t
 *
 * \deprecated Deprecated in favor of H5Sencode2()
 *
 * \details Given the data space identifier \p obj_id, H5Sencode1() converts
 *          a data space description into binary form in a buffer. Using
 *          this binary form in the buffer, a data space object can be
 *          reconstructed using H5Sdecode() to return a new object handle
 *          (\p hid_t) for this data space.
 *
 *          A preliminary H5Sencode1() call can be made to find out the size
 *          of the buffer needed. This value is returned as \p nalloc. That
 *          value can then be assigned to \p nalloc for a second H5Sencode1()
 *          call, which will retrieve the actual encoded object.
 *
 *          If the library finds out \p nalloc is not big enough for the
 *          object, it simply returns the size of the buffer needed through
 *          \p nalloc without encoding the provided buffer.
 *
 *          The types of data space addressed in this function are null,
 *          scalar, and simple space. For a simple data space, the information
 *          on the selection, for example, hyperslab selection, is also
 *          encoded and decoded. A complex data space has not been
 *          implemented in the library.
 *
 * \version 1.12.0 The function H5Sencode() was renamed H5Sencode1() and
 *                 deprecated.
 * \since 1.8.0
 *
 */
H5_DLL herr_t H5Sencode1(hid_t obj_id, void *buf, size_t *nalloc);

#endif /* H5_NO_DEPRECATED_SYMBOLS */

#ifdef __cplusplus
}
#endif
#endif /* H5Spublic_H */