/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
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* the COPYING file, which can be found at the root of the source code *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#ifndef H5DSpublic_H
#define H5DSpublic_H
#define DIMENSION_SCALE_CLASS "DIMENSION_SCALE"
#define DIMENSION_LIST "DIMENSION_LIST"
#define REFERENCE_LIST "REFERENCE_LIST"
#define DIMENSION_LABELS "DIMENSION_LABELS"
/**
* \brief Prototype for H5DSiterate_scales() operator
*
*/
//!
typedef herr_t (*H5DS_iterate_t)(hid_t dset, unsigned dim, hid_t scale, void *visitor_data);
//!
#ifdef __cplusplus
extern "C" {
#endif
/** \page H5DS_UG HDF5 High Level Dimension Scales
* @todo Under Construction
*/
/**\defgroup H5DS HDF5 Dimension Scales APIs (H5DS)
*
* Creating and manipulating HDF5 datasets that are associated with
* the dimension of another HDF5 dataset (H5DS)
*
* \note \Bold{Programming hints:}
* \note To use any of these functions or subroutines,
* you must first include the relevant include file (C) or
* module (Fortran) in your application.
* \note The following line includes the HDF5 Dimension Scale package,
* H5DS, in C applications:
* \code #include "hdf5_hl.h" \endcode
* \note This line includes the H5DS module in Fortran applications:
* \code use h5ds \endcode
*
* - \ref H5DSwith_new_ref
* \n Determines if new references are used with dimension scales.
* - \ref H5DSattach_scale
* \n Attach dimension scale dsid to dimension idx of dataset did.
* - \ref H5DSdetach_scale
* \n Detach dimension scale dsid from the dimension idx of Dataset did.
* - \ref H5DSget_label
* \n Read the label for dimension idx of did into buffer label.
* - \ref H5DSget_num_scales
* \n Determines how many Dimension Scales are attached
* to dimension idx of did.
* - \ref H5DSget_scale_name
* \n Retrieves name of scale did into buffer name.
* - \ref H5DSis_attached
* \n Report if dimension scale dsid is currently attached
* to dimension idx of dataset did.
* - \ref H5DSis_scale
* \n Determines whether dset is a Dimension Scale.
* - \ref H5DSiterate_scales
* \n Iterates the operation visitor through the scales
* attached to dimension dim.
* - \ref H5DSset_label
* \n Set label for the dimension idx of did to the value label.
* - \ref H5DSset_scale
* \n Convert dataset dsid to a dimension scale,
* with optional name, dimname.
*
*/
/* THIS IS A NEW ROUTINE NOT ON OLD PORTAL */
/**
* --------------------------------------------------------------------------
* \ingroup H5DS
*
* \brief Determines if new references are used with dimension scales.
*
* \param[in] obj_id Object identifier
* \param[out] with_new_ref New references are used or not
*
* \return \herr_t
*
* \details H5DSwith_new_ref() takes any object identifier and checks
* if new references are used for dimension scales. Currently,
* new references are used when non-native VOL connector is
* used or when H5_DIMENSION_SCALES_WITH_NEW_REF is set up
* via configure option.
*
*/
H5_HLDLL herr_t H5DSwith_new_ref(hid_t obj_id, hbool_t *with_new_ref);
/**
* --------------------------------------------------------------------------
* \ingroup H5DS
*
* \brief Attach dimension scale \p dsid to dimension \p idx of
* dataset did.
*
* \param[in] did The dataset
* \param[in] dsid The scale to be attached
* \param[in] idx The dimension of \p did that \p dsid is associated with
*
* \return \herr_t
*
* \details Define Dimension Scale \p dsid to be associated with
* dimension \p idx of dataset \p did.
*
* Entries are created in the #DIMENSION_LIST and
* #REFERENCE_LIST attributes, as defined in section 4.2 of
*
* HDF5 Dimension Scale Specification.
*
* Fails if:
* - Bad arguments
* - If \p dsid is not a Dimension Scale
* - If \p did is a Dimension Scale
* (A Dimension Scale cannot have scales.)
*
* \note The Dimension Scale \p dsid can be attached to the
* same dimension more than once, which has no effect.
*/
H5_HLDLL herr_t H5DSattach_scale(hid_t did, hid_t dsid, unsigned int idx);
/**
* --------------------------------------------------------------------------
* \ingroup H5DS
*
* \brief Detach dimension scale \p dsid from the dimension \p idx of dataset \p did.
*
* \param[in] did The dataset
* \param[in] dsid The scale to be detached
* \param[in] idx The dimension of \p did to detach
*
* \return \herr_t
*
* \details If possible, deletes association of Dimension Scale \p dsid with
* dimension \p idx of dataset \p did. This deletes the entries in the
* #DIMENSION_LIST and #REFERENCE_LIST attributes,
* as defined in section 4.2 of
*
* HDF5 Dimension Scale Specification.
*
* Fails if:
* - Bad arguments
* - The dataset \p did or \p dsid do not exist
* - The \p dsid is not a Dimension Scale
* - \p dsid is not attached to \p did
*
* \note A scale may be associated with more than dimension of the
* same dataset. If so, the detach operation only deletes one
* of the associations, for \p did.
*
*/
H5_HLDLL herr_t H5DSdetach_scale(hid_t did, hid_t dsid, unsigned int idx);
/**
* --------------------------------------------------------------------------
* \ingroup H5DS
*
* \brief Convert dataset \p dsid to a dimension scale,
* with optional name, \p dimname.
*
* \param[in] dsid The dataset to be made a Dimemsion Scale
* \param[in] dimname The dimension name (optional), NULL if the
* dimension has no name.
*
* \return \herr_t
*
* \details The dataset \p dsid is converted to a Dimension Scale dataset,
* as defined above. Creates the CLASS attribute, set to the value
* "DIMENSION_SCALE" and an empty #REFERENCE_LIST attribute,
* as described in
*
* HDF5 Dimension Scale Specification.
* (PDF, see section 4.2).
*
* If \p dimname is specified, then an attribute called NAME
* is created, with the value \p dimname.
*
* Fails if:
* - Bad arguments
* - If \p dsid is already a scale
* - If \p dsid is a dataset which already has dimension scales
*
* If the dataset was created with the Table, Image, or Palette interface [9],
* it is not recommended to convert to a Dimension Scale.
* (These Datasets will have a CLASS Table, Image, or Palette.)
*
* \todo what is [9] after Palette interface?
*/
H5_HLDLL herr_t H5DSset_scale(hid_t dsid, const char *dimname);
/**
* --------------------------------------------------------------------------
* \ingroup H5DS
*
* \brief Determines how many Dimension Scales are attached
* to dimension \p idx of \p did.
*
* \param[in] did The dataset to query
* \param[in] idx The dimension of \p did to query
*
* \return Returns the number of Dimension Scales associated
* with \p did, if successful, otherwise returns a
* negative value.
*
* \details H5DSget_num_scales() determines how many Dimension
* Scales are attached to dimension \p idx of
* dataset \p did.
*
*/
H5_HLDLL int H5DSget_num_scales(hid_t did, unsigned int idx);
/**
* --------------------------------------------------------------------------
* \ingroup H5DS
*
* \brief Set label for the dimension \p idx of \p did
* to the value \p label.
*
* \param[in] did The dataset
* \param[in] idx The dimension
* \param[in] label The label
*
* \return \herr_t
*
* \details Sets the #DIMENSION_LABELS for dimension \p idx of
* dataset \p did. If the dimension had a label,
* the new value replaces the old.
*
* Fails if:
* - Bad arguments
*
*/
H5_HLDLL herr_t H5DSset_label(hid_t did, unsigned int idx, const char *label);
/**
* --------------------------------------------------------------------------
* \ingroup H5DS
*
* \brief Read the label for dimension \p idx of \p did into buffer \p label.
*
* \param[in] did The dataset
* \param[in] idx The dimension
* \param[out] label The label
* \param[in] size The length of the label buffer
*
* \return Upon success, size of label or zero if no label found.
* Negative if fail.
*
* \details Returns the value of the #DIMENSION_LABELS for
* dimension \p idx of dataset \p did, if set.
* Up to \p size characters of the name are copied into
* the buffer \p label. If the label is longer than
* \p size, it will be truncated to fit. The parameter
* \p size is set to the size of the returned \p label.
*
* If \p did has no label, the return value of
* \p label is NULL.
*
* Fails if:
* - Bad arguments
*
*/
H5_HLDLL ssize_t H5DSget_label(hid_t did, unsigned int idx, char *label, size_t size);
/**
* --------------------------------------------------------------------------
* \ingroup H5DS
*
* \brief Retrieves name of scale \p did into buffer \p name.
*
* \param[in] did Dimension scale identifier
* \param[out] name Buffer to contain the returned name
* \param[in] size Size in bytes, of the \p name buffer
*
* \return Upon success, the length of the scale name or zero if no name found.
* Negative if fail.
*
* \details H5DSget_scale_name() retrieves the name attribute
* for scale \p did.
*
* Up to \p size characters of the scale name are returned
* in \p name; additional characters, if any, are not returned
* to the user application.
*
* If the length of the name, which determines the required value of
* \p size, is unknown, a preliminary H5DSget_scale_name() call can
* be made by setting \p name to NULL. The return value of this call
* will be the size of the scale name; that value plus one (1) can then
* be assigned to \p size for a second H5DSget_scale_name() call,
* which will retrieve the actual name. (The value passed in with the
* parameter \p size must be one greater than size in bytes of the actual
* name in order to accommodate the null terminator;
* if \p size is set to the exact size of the name, the last byte
* passed back will contain the null terminator and the last character
* will be missing from the name passed back to the calling application.)
*/
H5_HLDLL ssize_t H5DSget_scale_name(hid_t did, char *name, size_t size);
/**
* --------------------------------------------------------------------------
* \ingroup H5DS
*
* \brief Determines whether \p did is a Dimension Scale.
*
* \param[in] did The dataset to query
*
* \return \htri_t
*
* \details H5DSis_scale() determines if \p did is a Dimension Scale,
* i.e., has class="DIMENSION_SCALE").
*
*/
H5_HLDLL htri_t H5DSis_scale(hid_t did);
/**
* --------------------------------------------------------------------------
* \ingroup H5DS
*
* \brief Iterates the operation visitor through the scales
* attached to dimension \p dim.
*
* \param[in] did The dataset
* \param[in] dim The dimension of dataset \p did
* \param[in,out] idx Input the index to start iterating,
* output the next index to visit.
* If NULL, start at the first position.
* \param[in] visitor The visitor function
* \param[in] visitor_data Arbitrary data to pass to the
* visitor function
*
* \return Returns the return value of the last operator if it was
* non-zero, or zero if all scales were processed.
*
* \details H5DSiterate_scales() iterates over the scales attached to
* dimension \p dim of dataset \p did. For each scale in the
* list, the \p visitor_data and some additional information,
* specified below, are passed to the \p visitor function.
* The iteration begins with the \p idx object in the
* group and the next element to be processed by the operator
* is returned in \p idx. If \p idx is NULL, then the
* iterator starts at the first group member; since no
* stopping point is returned in this case,
* the iterator cannot be restarted if one of the calls
* to its operator returns non-zero.
*
* The prototype for \ref H5DS_iterate_t is:
* \snippet this H5DS_iterate_t_snip
*
* The operation receives the Dimension Scale dataset
* identifier, \p scale, and the pointer to the operator
* data passed in to H5DSiterate_scales(), \p visitor_data.
*
* The return values from an operator are:
*
* - Zero causes the iterator to continue, returning zero
* when all group members have been processed.
* - Positive causes the iterator to immediately return that
* positive value, indicating short-circuit success.
* The iterator can be restarted at the next group member.
* - Negative causes the iterator to immediately return
* that value, indicating failure. The iterator can be
* restarted at the next group member.
*
* H5DSiterate_scales() assumes that the scales of the
* dimension identified by \p dim remain unchanged through
* the iteration. If the membership changes during the iteration,
* the function's behavior is undefined.
*/
H5_HLDLL herr_t H5DSiterate_scales(hid_t did, unsigned int dim, int *idx, H5DS_iterate_t visitor,
void *visitor_data);
/**
* --------------------------------------------------------------------------
* \ingroup H5DS
*
* \brief Report if dimension scale \p dsid is currently attached to
* dimension \p idx of dataset \p did.
*
* \param[in] did The dataset
* \param[in] dsid The scale to be attached
* \param[in] idx The dimension of \p did that \p dsid is associated with
*
* \return \htri_t
*
* \details Report if dimension scale \p dsid is currently attached to
* dimension \p idx of dataset \p did.
*
* Fails if:
* - Bad arguments
* - If \p dsid is not a Dimension Scale
* - The \p dsid is not a Dimension Scale
* - If \p did is a Dimension Scale (A Dimension Scale cannot have scales.)
*
*/
H5_HLDLL htri_t H5DSis_attached(hid_t did, hid_t dsid, unsigned int idx);
#ifdef __cplusplus
}
#endif
#endif