diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/H5Apublic.h | 872 | ||||
| -rw-r--r-- | src/H5Fpublic.h | 2 | ||||
| -rw-r--r-- | src/H5Ppublic.h | 5028 | ||||
| -rw-r--r-- | src/H5Spublic.h | 1096 |
4 files changed, 6673 insertions, 325 deletions
diff --git a/src/H5Apublic.h b/src/H5Apublic.h index 847f053..993961f 100644 --- a/src/H5Apublic.h +++ b/src/H5Apublic.h @@ -23,12 +23,14 @@ #include "H5Tpublic.h" /* Datatypes */ /* Information struct for attribute (for H5Aget_info/H5Aget_info_by_idx) */ +//! [H5A_info_t_snip] typedef struct { hbool_t corder_valid; /* Indicate if creation order is valid */ H5O_msg_crt_idx_t corder; /* Creation order */ H5T_cset_t cset; /* Character set of attribute name */ hsize_t data_size; /* Size of raw data */ } H5A_info_t; +//! [H5A_info_t_snip] /* Typedef for H5Aiterate2() callbacks */ typedef herr_t (*H5A_operator2_t)(hid_t location_id /*in*/, const char *attr_name /*in*/, @@ -45,6 +47,27 @@ typedef herr_t (*H5A_operator2_t)(hid_t location_id /*in*/, const char *attr_nam extern "C" { #endif +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Closes the specified attribute + * + * \attr_id + * + * \return \herr_t + * + * \details H5Aclose() terminates access to the attribute specified by + * \p attr_id by releasing the identifier. + * + * \attention Further use of a released attribute identifier is illegal; a + * function using such an identifier will generate an error. + * + * \since 1.0.0 + * + * \see H5Acreate(), H5Aopen() + */ +H5_DLL herr_t H5Aclose(hid_t attr_id); /* --------------------------------------------------------------------------*/ /** * \ingroup H5A @@ -92,8 +115,8 @@ extern "C" { * \see H5Aclose() * */ -H5_DLL hid_t H5Acreate2(hid_t loc_id, const char *attr_name, hid_t type_id, hid_t space_id, hid_t acpl_id, - hid_t aapl_id); +H5_DLL hid_t H5Acreate2(hid_t loc_id, const char *attr_name, hid_t type_id, hid_t space_id, hid_t acpl_id, + hid_t aapl_id); H5_DLL hid_t H5Acreate_async(const char *app_file, const char *app_func, unsigned app_line, hid_t loc_id, const char *attr_name, hid_t type_id, hid_t space_id, hid_t acpl_id, hid_t aapl_id, hid_t es_id); @@ -144,8 +167,626 @@ H5_DLL hid_t H5Acreate_async(const char *app_file, const char *app_func, unsigne * \since 1.8.0 * */ -H5_DLL hid_t H5Acreate_by_name(hid_t loc_id, const char *obj_name, const char *attr_name, hid_t type_id, - hid_t space_id, hid_t acpl_id, hid_t aapl_id, hid_t lapl_id); +H5_DLL hid_t H5Acreate_by_name(hid_t loc_id, const char *obj_name, const char *attr_name, hid_t type_id, + hid_t space_id, hid_t acpl_id, hid_t aapl_id, hid_t lapl_id); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Deletes an attribute from a specified location + * + * \fgdt_loc_id + * \param[in] attr_name Name of the attribute to delete + * + * \return \herr_t + * + * \details H5Adelete() removes the attribute specified by its name, + * \p attr_name, from a file, dataset, group, or named datatype. + * This function should not be used when attribute identifiers + * are open on \p loc_id as it may cause the internal indexes of + * the attributes to change and future writes to the open + * attributes to produce incorrect results. + * + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Adelete(hid_t loc_id, const char *attr_name); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Deletes an attribute from an object according to index order + * + * \fgdt_loc_id + * \param[in] obj_name Name of object, relative to location, from which + * attribute is to be removed + * \param[in] idx_type Type of index + * \param[in] order Order in which to iterate over index + * \param[in] n Offset within index + * \lapl_id + * + * \return \herr_t + * + * \details H5Adelete_by_idx() removes an attribute, specified by its + * location in an index, from an object. + * + * The object from which the attribute is to be removed is + * specified by a location identifier and name, \p loc_id and + * \p obj_name, respectively. If \p loc_id fully specifies the + * object from which the attribute is to be removed, \p obj_name + * should be '.' (a dot). + * + * The attribute to be removed is specified by a position in an + * index, \p n. The type of index is specified by \p idx_type and + * may be #H5_INDEX_NAME, for an alpha-numeric index by name, or + * #H5_INDEX_CRT_ORDER, for an index by creation order. The order + * in which the index is to be traversed is specified by \p order + * and may be #H5_ITER_INC (increment) for top-down iteration, + * #H5_ITER_DEC (decrement) for bottom-up iteration, or + * #H5_ITER_NATIVE, in which case HDF5 will iterate in the + * fastest-available order. For example, if \p idx_type, \p order, + * and \p n are set to #H5_INDEX_NAME, #H5_ITER_INC, and 5, + * respectively, the fifth attribute by alpha-numeric order of + * attribute names will be removed. + * + * For a discussion of \p idx_type and \p order, the valid values + * of those parameters, and the use of \p n, see the description + * of H5Aiterate2(). + * + * The link access property list, \p lapl_id, may provide + * information regarding the properties of links required to access + * the object, \p obj_name. + + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Adelete_by_idx(hid_t loc_id, const char *obj_name, + H5_index_t idx_type, H5_iter_order_t order, hsize_t n, hid_t lapl_id); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Removes an attribute from a specified location + * + * \fgdt_loc_id + * \param[in] obj_name Name of object, relative to location, from which + * attribute is to be removed + * \param[in] attr_name Name of attribute to delete + * \lapl_id + * + * \return \herr_t + * + * \details H5Adelete_by_name() removes the attribute \p attr_name + * from an object specified by location and name, \p loc_id and + * \p obj_name, respectively. + * + * If \p loc_id fully specifies the object from which the + * attribute is to be removed, \p obj_name should be '.' (a dot). + * + * The link access property list, \p lapl_id, may provide + * information regarding the properties of links required to + * access the object, \p obj_name. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Adelete_by_name(hid_t loc_id, const char *obj_name, + const char *attr_name, hid_t lapl_id); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Determines whether an attribute with a given name exists on an + * object + * + * \fgdt_loc_id{obj_id} + * \param[in] attr_name Attribute name + * + * \return \htri_t + * + * \details H5Aexists() determines whether the attribute \p attr_name + * exists on the object specified by \p obj_id. + * + * \since 1.8.0 + * + */ +H5_DLL htri_t H5Aexists(hid_t obj_id, const char *attr_name); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Determines whether an attribute with a given name exists on an + * object + * + * \fgdt_loc_id{obj_id} + * \param[in] obj_name Object name + * \param[in] attr_name Attribute name + * \lapl_id + * + * \return \htri_t + * + * \details H5Aexists_by_name() determines whether the attribute + * \p attr_name exists on an object. That object is specified by + * its location and name, \p loc_id and \p obj_name, respectively. + * + * \p loc_id specifies a location in the file containing the object. + * \p obj_name is the name of the object to which the attribute is + * attached and can be a relative name, relative to \p loc_id, + * or an absolute name, based in the root group of the file. If + * \p loc_id fully specifies the object, \p obj_name should be '.' + * (a dot). + * + * The link access property list, \p lapl_id, may provide + * information regarding the properties of links required to access + * \p obj_name. + * + * \since 1.8.0 + * + */ +H5_DLL htri_t H5Aexists_by_name(hid_t obj_id, const char *obj_name, + const char *attr_name, hid_t lapl_id); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Gets an attribute creation property list identifier + * + * \attr_id + * + * \return \hid_tv{attribute's creation property list} + * + * \details H5Aget_create_plist() returns an identifier for the attribute + * creation property list associated with the attribute specified + * by \p attr_id. + * + * The creation property list identifier should be released with + * H5Pclose(). + * + * \since 1.8.0 + * + */ +H5_DLL hid_t H5Aget_create_plist(hid_t attr_id); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Retrieves attribute information, by attribute identifier + * + * \attr_id + * \param[out] ainfo Attribute information struct + * + * \return \herr_t + * + * \details H5Aget_info() retrieves attribute information, locating the + * attribute with an attribute identifier, \p attr_id, which is + * the identifier returned by H5Aopen() or H5Aopen_by_idx(). The + * attribute information is returned in the \p ainfo struct. + * + * The \p ainfo struct is defined as follows: + * \snippet this H5A_info_t_snip + * + * \p corder_valid indicates whether the creation order data is + * valid for this attribute. Note that if creation order is not + * being tracked, no creation order data will be valid. Valid + * values are \c TRUE and \c FALSE. + * + * \p corder is a positive integer containing the creation + * order of the attribute. This value is 0-based, so, for + * example, the third attribute created will have a \p corder + * value of 2. + * + * \p cset indicates the character set used for the attribute’s + * name; valid values are defined in H5Tpublic.h and include + * the following: + * \csets + * This value is set with H5Pset_char_encoding(). + * + * \p data_size indicates the size, in the number of characters, + * of the attribute. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Aget_info(hid_t attr_id, H5A_info_t *ainfo /*out*/); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Retrieves attribute information by attribute index position + * + * \fgdt_loc_id + * \param[in] obj_name Name of object to which attribute is attached, + * relative to location + * \param[in] idx_type Type of index + * \param[in] order Index traversal order + * \param[in] n Attribute’s position in index + * \param[out] ainfo Struct containing returned attribute information + * \lapl_id + * + * \return \herr_t + * + * \details H5Aget_info_by_idx() retrieves information for an attribute + * that is attached to an object, which is specified by its + * location and name, \p loc_id and \p obj_name, respectively. + * The attribute is located by its index position and the attribute + * information is returned in the \p ainfo struct. + * + * If \p loc_id fully specifies the object to which the attribute + * is attached, \p obj_name should be '.' (a dot). + * + * The attribute is located by means of an index type, an index + * traversal order, and a position in the index, \p idx_type, + * \p order and \p n, respectively. These parameters and their + * valid values are discussed in the description of H5Aiterate2(). + * + * The \p ainfo struct, which will contain the returned attribute + * information, is described in H5Aget_info(). + * + * The link access property list, \p lapl_id, may provide + * information regarding the properties of links required to access + * the object, \p obj_name. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Aget_info_by_idx(hid_t loc_id, const char *obj_name, + H5_index_t idx_type, H5_iter_order_t order, hsize_t n, + H5A_info_t *ainfo /*out*/, hid_t lapl_id); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Retrieves attribute information, by attribute name + * + * \fgdt_loc_id + * + * \param[in] obj_name Name of object to which attribute is attached, + * relative to location + * \param[in] attr_name Attribute name + * \param[out] ainfo Struct containing returned attribute information + * \lapl_id + * + * \return \herr_t + * + * \details H5Aget_info_by_name() retrieves information for an attribute, + * \p attr_name, that is attached to an object specified by its + * location and name, \p loc_id and \p obj_name, respectively. + * The attribute information is returned in the \p ainfo struct. + * + * If \p loc_id fully specifies the object to which the attribute + * is attached, \p obj_name should be '.' (a dot). + * + * The \p ainfo struct is described in H5Aget_info(). + * + * The link access property list, \p lapl_id, may provide + * information regarding the properties of links required to + * access the object, \p obj_name. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Aget_info_by_name(hid_t loc_id, const char *obj_name, + const char *attr_name, H5A_info_t *ainfo /*out*/, hid_t lapl_id); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Gets an attribute name + * + * \attr_id + * \param[in] buf_size The size of the buffer to store the name in + * \param[out] buf Buffer to store name in + * + * \return Returns the length of the attribute's name, which may be longer + * than \p buf_size, if successful. Otherwise returns a negative + * value. + * + * \details H5Aget_name() retrieves the name of an attribute specified by + * the identifier, \p attr_id. Up to \p buf_size characters are + * stored in \p buf followed by a \0 string terminator. If the + * name of the attribute is longer than (\p buf_size -1), the + * string terminator is stored in the last position of the buffer + * to properly terminate the string. + * + * If the user only wants to find out the size of this name, the + * values 0 and NULL can be passed in for the parameters + * \p bufsize and \p buf. + * + * \since 1.0.0 + * + */ +H5_DLL ssize_t H5Aget_name(hid_t attr_id, size_t buf_size, char *buf); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Gets an attribute name, by attribute index position + * + * \fgdt_loc_id + * \param[in] obj_name Name of object to which attribute is attached, + * relative to location + * \param[in] idx_type Type of index + * \param[in] order Index traversal order + * \param[in] n Attribute’s position in index + * \param[out] name Attribute name + * \param[in] size Size, in bytes, of attribute name + * \lapl_id + * + * \return Returns attribute name size, in bytes, if successful; + * otherwise returns a negative value. + * + * \details H5Aget_name_by_idx() retrieves the name of an attribute that is + * attached to an object, which is specified by its location and + * name, \p loc_id and \p obj_name, respectively. The attribute is + * located by its index position, the size of the name is specified + * in \p size, and the attribute name is returned in \p name. + * + * If \p loc_id fully specifies the object to which the attribute + * is attached, \p obj_name should be '.' (a dot). + * + * The attribute is located by means of an index type, an index + * traversal order, and a position in the index, \p idx_type, + * \p order and \p n, respectively. These parameters and their + * valid values are discussed in the description of H5Aiterate2(). + * + * If the attribute name’s size is unknown, the values 0 and NULL + * can be passed in for the parameters \p size and \p name. The + * function’s return value will provide the correct value for + * \p size. + * + * The link access property list, \p lapl_id, may provide + * information regarding the properties of links required to access + * the object, \p obj_name. + * + * \since 1.8.0 + * + */ +H5_DLL ssize_t H5Aget_name_by_idx(hid_t loc_id, const char *obj_name, + H5_index_t idx_type, H5_iter_order_t order, hsize_t n, + char *name /*out*/, size_t size, hid_t lapl_id); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Gets a copy of the dataspace for an attribute + * + * \attr_id + * + * \return \hid_tv{attribute dataspace} + * + * \details H5Aget_space() retrieves a copy of the dataspace for an + * attribute. The dataspace identifier returned from this + * function must be released with H5Sclose() or resource leaks + * will develop. + * + * \since 1.0.0 + * + */ +H5_DLL hid_t H5Aget_space(hid_t attr_id); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Returns the amount of storage required for an attribute + * + * \attr_id + * + * \return Returns the amount of storage size allocated for the attribute; + * otherwise returns 0 (zero). + * + * \details H5Aget_storage_size() returns the amount of storage that is + * required for the specified attribute, \p attr_id. + * + * \since 1.6.0 + * + */ +H5_DLL hsize_t H5Aget_storage_size(hid_t attr_id); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Gets an attribute datatype + * + * \attr_id + * + * \return \hid_t{datatype} + * + * \details H5Aget_type() retrieves a copy of the datatype for an attribute. + * The datatype is reopened if it is a named type before returning + * it to the application. The datatypes returned by this function + * are always read-only. If an error occurs when atomizing the + * return datatype, then the datatype is closed. + * + * The datatype identifier returned from this function must be + * released with H5Tclose() or resource leaks will develop. + * + * \since 1.0.0 + * + */ +H5_DLL hid_t H5Aget_type(hid_t attr_id); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Calls user-defined function for each attribute on an object + * + * \fgdt_loc_id + * \param[in] idx_type Type of index + * \param[in] order Order in which to iterate over index + * \param[in,out] idx Initial and returned offset within index + * \param[in] op User-defined function to pass each attribute to + * \param[in,out] op_data User data to pass through to and to be returned + * by iterator operator function + * + * \return \herr_t + * Further note that this function returns the return value of the + * last operator if it was non-zero, which can be a negative value, + * zero if all attributes were processed, or a positive value + * indicating short-circuit success. + * + * \details H5Aiterate2() iterates over the attributes attached to a + * dataset, named datatype, or group, as specified by \p loc_id. + * For each attribute, user-provided data, \p op_data, with + * additional information as defined below, is passed to a + * user-defined function, \p op, which operates on that + * attribute. + * + * The order of the iteration and the attributes iterated over + * are specified by three parameters: the index type, + * \p idx_type; the order in which the index is to be traversed, + * \p order; and the attribute’s position in the index, \p idx. + * + * The type of index specified by \p idx_type can be one of the + * following: + * + * \indexes + * + * The order in which the index is to be traversed, as specified + * by \p order, can be one of the following: + * + * \orders + * + * The next attribute to be operated on is specified by \p idx, + * a position in the index. + * + * For example, if \p idx_type, \p order, and \p idx are set to + * #H5_INDEX_NAME, #H5_ITER_INC, and 5, respectively, the attribute + * in question is the fifth attribute from the beginning of the + * alpha-numeric index of attribute names. If \p order were set to + * #H5_ITER_DEC, it would be the fifth attribute from the end of + * the index. + * + * The parameter \p idx is passed in on an H5Aiterate2() call with + * one value and may be returned with another value. The value + * passed in identifies the parameter to be operated on first; + * the value returned identifies the parameter to be operated on + * in the next step of the iteration. + * + * The #H5A_operator2_t prototype for the \p op parameter is a + * user defined function where: + * The operation receives the location identifier for the group or + * dataset being iterated over, \p location_id; the name of the + * current object attribute, \p attr_name; the attribute’s info + * struct, \p ainfo; and a pointer to the operator data passed + * into H5Aiterate2(), \p op_data. + * + * Valid return values from an operator and the resulting + * H5Aiterate2() and \p op behavior are as follows: + * + * \li Zero causes the iterator to continue, returning zero when + * all attributes have been processed. + * \li A positive value causes the iterator to immediately return + * that positive value, indicating short-circuit success. The + * iterator can be restarted at the next attribute, as + * indicated by the return value of \p idx. + * \li A negative value causes the iterator to immediately return + * that value, indicating failure. The iterator can be + * restarted at the next attribute, as indicated by the return + * value of \p idx. + * + * \note This function is also available through the H5Aiterate() macro. + * \todo Add snippet for H5A_operator2_t + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Aiterate2(hid_t loc_id, H5_index_t idx_type, + H5_iter_order_t order, hsize_t *idx, H5A_operator2_t op, void *op_data); +/*--------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Calls user-defined function for each attribute on an object + * + * \fgdt_loc_id + * \param[in] obj_name Name of object, relative to location + * \param[in] idx_type Type of index + * \param[in] order Order in which to iterate over index + * \param[in,out] idx Initial and returned offset within index + * \param[in] op User-defined function to pass each attribute to + * \param[in,out] op_data User data to pass through to and to be returned + * by iterator operator function + * \lapl_id + * + * \return \herr_t + * Further note that this function returns the return value of + * the last operator if it was non-zero, which can be a negative + * value, zero if all attributes were processed, or a positive value + * indicating short-circuit success. + * + * \details H5Aiterate_by_name() iterates over the attributes attached + * to the dataset or group specified with \p loc_id and \p obj_name. + * For each attribute, user-provided data, \p op_data, with + * additional information as defined below, is passed to a + * user-defined function, \p op, which operates on that attribute. + * + * If \p loc_id fully specifies the object to which these + * attributes are attached, \p obj_name should be '.' (a dot). + * + * The order of the iteration and the attributes iterated over + * are specified by three parameters: the index type, \p idx_type; + * the order in which the index is to be traversed, \p order; + * and the attribute’s position in the index, \p idx. + * + * The type of index specified by \p idx_type can be one of the + * following: + * + * \indexes + * + * The order in which the index is to be traversed, as specified + * by \p order, can be one of the following: + * + * \orders + * + * The next attribute to be operated on is specified by \p idx, + * a position in the index. + * + * For example, if \p idx_type, \p order, and \p idx are set to + * #H5_INDEX_NAME, #H5_ITER_INC, and 5, respectively, the attribute + * in question is the fifth attribute from the beginning of the + * alpha-numeric index of attribute names. If \p order were set to + * #H5_ITER_DEC, it would be the fifth attribute from the end of + * the index. + * + * The parameter \p idx is passed in on an H5Aiterate_by_name() + * call with one value and may be returned with another value. The + * value passed in identifies the parameter to be operated on first; + * the value returned identifies the parameter to be operated on in + * the next step of the iteration. + * + * The #H5A_operator2_t prototype for the \p op parameter is a + * user defined function where: + * The operation receives the location identifier for the group or + * dataset being iterated over, \p location_id; the name of the + * current object attribute, \p attr_name; the attribute’s info + * struct, \p ainfo; and a pointer to the operator data passed + * into H5Aiterate_by_name(), \p op_data. + * + * Valid return values from an operator and the resulting + * H5Aiterate_by_name() and \p op behavior are as follows: + * + * \li Zero causes the iterator to continue, returning zero when + * all attributes have been processed. + * \li A positive value causes the iterator to immediately return + * that positive value, indicating short-circuit success. + * The iterator can be restarted at the next attribute, as + * indicated by the return value of \p idx. + * \li A negative value causes the iterator to immediately return + * that value, indicating failure. The iterator can be + * restarted at the next attribute, as indicated by the return + * value of \p idx. + * + * The link access property list, \p lapl_id, may provide + * information regarding the properties of links required to access + * the object, \p obj_name. + * + * \todo Add snippet to show H5Aoperator2_t. + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Aiterate_by_name(hid_t loc_id, const char *obj_name, H5_index_t idx_type, + H5_iter_order_t order, hsize_t *idx, H5A_operator2_t op, void *op_data, + hid_t lapl_id); H5_DLL hid_t H5Acreate_by_name_async(const char *app_file, const char *app_func, unsigned app_line, hid_t loc_id, const char *obj_name, const char *attr_name, hid_t type_id, hid_t space_id, hid_t acpl_id, hid_t aapl_id, hid_t lapl_id, @@ -180,7 +821,7 @@ H5_DLL hid_t H5Acreate_by_name_async(const char *app_file, const char *app_func, * * \see H5Aclose(), H5Acreate() */ -H5_DLL hid_t H5Aopen(hid_t obj_id, const char *attr_name, hid_t aapl_id); +H5_DLL hid_t H5Aopen(hid_t obj_id, const char *attr_name, hid_t aapl_id); H5_DLL hid_t H5Aopen_async(const char *app_file, const char *app_func, unsigned app_line, hid_t obj_id, const char *attr_name, hid_t aapl_id, hid_t es_id); /*--------------------------------------------------------------------------*/ @@ -228,8 +869,8 @@ H5_DLL hid_t H5Aopen_async(const char *app_file, const char *app_func, unsigned * \since 1.8.0 * */ -H5_DLL hid_t H5Aopen_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type, H5_iter_order_t order, - hsize_t n, hid_t aapl_id, hid_t lapl_id); +H5_DLL hid_t H5Aopen_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type, H5_iter_order_t order, + hsize_t n, hid_t aapl_id, hid_t lapl_id); H5_DLL hid_t H5Aopen_by_idx_async(const char *app_file, const char *app_func, unsigned app_line, hid_t loc_id, const char *obj_name, H5_index_t idx_type, H5_iter_order_t order, hsize_t n, hid_t aapl_id, hid_t lapl_id, hid_t es_id); @@ -274,8 +915,8 @@ H5_DLL hid_t H5Aopen_by_idx_async(const char *app_file, const char *app_func, un * \since 1.8.0 * */ -H5_DLL hid_t H5Aopen_by_name(hid_t loc_id, const char *obj_name, const char *attr_name, hid_t aapl_id, - hid_t lapl_id); +H5_DLL hid_t H5Aopen_by_name(hid_t loc_id, const char *obj_name, const char *attr_name, hid_t aapl_id, + hid_t lapl_id); H5_DLL hid_t H5Aopen_by_name_async(const char *app_file, const char *app_func, unsigned app_line, hid_t loc_id, const char *obj_name, const char *attr_name, hid_t aapl_id, hid_t lapl_id, hid_t es_id); @@ -305,8 +946,30 @@ H5_DLL hid_t H5Aopen_by_name_async(const char *app_file, const char *app_func, u * * \see H5Awrite() * +*/ +H5_DLL herr_t H5Aread(hid_t attr_id, hid_t type_id, void *buf); +/*-------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Renames an attribute + * + * \fgdt_loc_id + * \param[in] old_name Name of the attribute to be changed + * \param[in] new_name New name for the attribute + * + * \return \herr_t + * + * \details H5Arename() changes the name of the attribute located at + * \p loc_id. + * + * The old name, \p old_name, is changed to the new name, + * \p new_name. + * + * \since 1.6.0 + * */ -H5_DLL herr_t H5Aread(hid_t attr_id, hid_t type_id, void *buf); +H5_DLL herr_t H5Arename(hid_t loc_id, const char *old_name, const char *new_name); H5_DLL herr_t H5Aread_async(const char *app_file, const char *app_func, unsigned app_line, hid_t attr_id, hid_t dtype_id, void *buf, hid_t es_id); /*--------------------------------------------------------------------------*/ @@ -343,40 +1006,13 @@ H5_DLL herr_t H5Aread_async(const char *app_file, const char *app_func, unsigned H5_DLL herr_t H5Awrite(hid_t attr_id, hid_t type_id, const void *buf); H5_DLL herr_t H5Awrite_async(const char *app_file, const char *app_func, unsigned app_line, hid_t attr_id, hid_t type_id, const void *buf, hid_t es_id); -H5_DLL hid_t H5Aget_space(hid_t attr_id); -H5_DLL hid_t H5Aget_type(hid_t attr_id); -H5_DLL hid_t H5Aget_create_plist(hid_t attr_id); -H5_DLL ssize_t H5Aget_name(hid_t attr_id, size_t buf_size, char *buf); -H5_DLL ssize_t H5Aget_name_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type, - H5_iter_order_t order, hsize_t n, char *name /*out*/, size_t size, - hid_t lapl_id); -H5_DLL hsize_t H5Aget_storage_size(hid_t attr_id); -H5_DLL herr_t H5Aget_info(hid_t attr_id, H5A_info_t *ainfo /*out*/); -H5_DLL herr_t H5Aget_info_by_name(hid_t loc_id, const char *obj_name, const char *attr_name, - H5A_info_t *ainfo /*out*/, hid_t lapl_id); -H5_DLL herr_t H5Aget_info_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type, - H5_iter_order_t order, hsize_t n, H5A_info_t *ainfo /*out*/, hid_t lapl_id); -H5_DLL herr_t H5Arename(hid_t loc_id, const char *old_name, const char *new_name); H5_DLL herr_t H5Arename_async(const char *app_file, const char *app_func, unsigned app_line, hid_t loc_id, const char *old_name, const char *new_name, hid_t es_id); -H5_DLL herr_t H5Arename_by_name(hid_t loc_id, const char *obj_name, const char *old_attr_name, - const char *new_attr_name, hid_t lapl_id); H5_DLL herr_t H5Arename_by_name_async(const char *app_file, const char *app_func, unsigned app_line, hid_t loc_id, const char *obj_name, const char *old_attr_name, const char *new_attr_name, hid_t lapl_id, hid_t es_id); -H5_DLL herr_t H5Aiterate2(hid_t loc_id, H5_index_t idx_type, H5_iter_order_t order, hsize_t *idx, - H5A_operator2_t op, void *op_data); -H5_DLL herr_t H5Aiterate_by_name(hid_t loc_id, const char *obj_name, H5_index_t idx_type, - H5_iter_order_t order, hsize_t *idx, H5A_operator2_t op, void *op_data, - hid_t lapd_id); -H5_DLL herr_t H5Adelete(hid_t loc_id, const char *name); -H5_DLL herr_t H5Adelete_by_name(hid_t loc_id, const char *obj_name, const char *attr_name, hid_t lapl_id); -H5_DLL herr_t H5Adelete_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type, H5_iter_order_t order, - hsize_t n, hid_t lapl_id); -H5_DLL htri_t H5Aexists(hid_t obj_id, const char *attr_name); H5_DLL herr_t H5Aexists_async(const char *app_file, const char *app_func, unsigned app_line, hid_t obj_id, const char *attr_name, hbool_t *exists, hid_t es_id); -H5_DLL htri_t H5Aexists_by_name(hid_t obj_id, const char *obj_name, const char *attr_name, hid_t lapl_id); H5_DLL herr_t H5Aexists_by_name_async(const char *app_file, const char *app_func, unsigned app_line, hid_t loc_id, const char *obj_name, const char *attr_name, hbool_t *exists, hid_t lapl_id, hid_t es_id); @@ -384,23 +1020,27 @@ H5_DLL herr_t H5Aexists_by_name_async(const char *app_file, const char *app_func /** * \ingroup H5A * - * \brief Closes the specified attribute - * - * \attr_id - * - * \return \herr_t + * \fgdt_loc_id + * \param[in] obj_name Name of object, relative to location, whose + * attribute is to be renamed + * \param[in] old_attr_name Prior attribute name + * \param[in] new_attr_name New attribute name + * \lapl_id * - * \details H5Aclose() terminates access to the attribute specified by - * \p attr_id by releasing the identifier. + * \details H5Arename_by_name() changes the name of attribute that is + * attached to the object specified by \p loc_id and \p obj_name. + * The attribute named \p old_attr_name is renamed + * \p new_attr_name. * - * \attention Further use of a released attribute identifier is illegal; a - * function using such an identifier will generate an error. + * The link access property list, \p lapl_id, may provide + * information regarding the properties of links required to + * access the object, \p obj_name. * - * \since 1.0.0 + * \since 1.8.0 * - * \see H5Acreate(), H5Aopen() */ -H5_DLL herr_t H5Aclose(hid_t attr_id); +H5_DLL herr_t H5Arename_by_name(hid_t loc_id, const char *obj_name, + const char *old_attr_name, const char *new_attr_name, hid_t lapl_id); H5_DLL herr_t H5Aclose_async(const char *app_file, const char *app_func, unsigned app_line, hid_t attr_id, hid_t es_id); @@ -499,10 +1139,136 @@ typedef herr_t (*H5A_operator1_t)(hid_t location_id /*in*/, const char *attr_nam * */ H5_DLL hid_t H5Acreate1(hid_t loc_id, const char *name, hid_t type_id, hid_t space_id, hid_t acpl_id); -H5_DLL hid_t H5Aopen_name(hid_t loc_id, const char *name); -H5_DLL hid_t H5Aopen_idx(hid_t loc_id, unsigned idx); -H5_DLL int H5Aget_num_attrs(hid_t loc_id); -H5_DLL herr_t H5Aiterate1(hid_t loc_id, unsigned *attr_num, H5A_operator1_t op, void *op_data); +/* --------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Determines the number of attributes attached to an object + * + * \fgdt_loc_id + * + * \return Returns the number of attributes if successful; otherwise returns + * a negative value. + * + * \deprecated This function is deprecated in favor of the functions + * H5Oget_info(), H5Oget_info_by_name(), and H5Oget_info_by_idx(). + * + * \details H5Aget_num_attrs() returns the number of attributes attached to + * the object specified by its identifier, \p loc_id. + * + * \since 1.0.0 + * + */ +H5_DLL int H5Aget_num_attrs(hid_t loc_id); +/* --------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Calls a user’s function for each attribute on an object + * + * \todo make prototype parameter match function (idx vs attr_num) + * + * \loc_id + * \param[in,out] idx Starting (in) and ending (out) attribute index + * \param[in] op User's function to pass each attribute to + * \param[in,out] op_data User's data to pass through to iterator operator + * function + * + * \return \herr_t + * + * \deprecated This function is deprecated in favor of the function + * H5Aiterate2(). + * + * \details H5Aiterate1() iterates over the attributes of the object + * specified by its identifier, \p loc_id. The object can be a + * group, dataset, or named datatype. For each attribute of the + * object, the \p op_data and some additional information specified + * below are passed to the operator function \p op. The iteration + * begins with the attribute specified by its index, \p idx; the + * index for the next attribute to be processed by the operator, + * \p op, is returned in \p idx. If \p idx is the null pointer, + * then all attributes are processed. + * + * The prototype for #H5A_operator1_t is a user defined function + * where: + * The operation receives the identifier for the group, dataset + * or named datatype being iterated over, \p loc_id, the name of + * the current object attribute, \p attr_name, and the pointer to + * the operator data passed in to H5Aiterate1(), \p op_data. + * + * The return values from an operator are: + * + * \li Zero causes the iterator to continue, returning zero when + * all attributes have been processed. + * \li Positive causes the iterator to immediately return that + * positive value, indicating short-circuit success. The + * iterator can be restarted at the next attribute. + * \li Negative causes the iterator to immediately return that value, + * indicating failure. The iterator can be restarted at the next + * attribute. + * + * \todo Add snippet to show H5A_operator1_t. + * + * \version 1.8.0 The function \p H5Aiterate was renamed to H5Aiterate1() + * and deprecated in this release. + * + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Aiterate1(hid_t loc_id, unsigned *idx, H5A_operator1_t op, + void *op_data); +/* --------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Opens the attribute specified by its index + * + * \loc_id + * \param[in] idx Index of the attribute to open + * + * \return \hid_tv{attribute} + * + * \deprecated This function is deprecated in favor of the function + * H5Aopen_by_idx(). + * + * \details H5Aopen_idx() opens an attribute which is attached to the + * object specified with \p loc_id . The location object may be + * either a group, dataset, or named datatype, all of which may + * have any sort of attribute. The attribute specified by the index, + * \p idx , indicates the attribute to access. The value of \p idx + * is a 0-based, non-negative integer. The attribute identifier + * returned from this function must be released with H5Aclose() + * or resource leaks will develop. + * + * \since 1.0.0 + * + */ +H5_DLL hid_t H5Aopen_idx(hid_t loc_id, unsigned idx); +/* --------------------------------------------------------------------------*/ +/** + * \ingroup H5A + * + * \brief Opens an attribute specified by name + * + * \loc_id + * \param[in] name Attribute name + * + * \return \hid_tv{attribute} + * + * \deprecated This function is deprecated in favor of the function + * H5Aopen_by_name(). + * + * \details H5Aopen_name() opens an attribute specified by its name, + * \p name, which is attached to the object specified with + * \p loc_id. The location object may be either a group, dataset, + * or named datatype, which may have any sort of attribute. The + * attribute identifier returned from this function must be + * released with H5Aclose() or resource leaks will develop. + * + * \since 1.0.0 + * + */ +H5_DLL hid_t H5Aopen_name(hid_t loc_id, const char *name); #endif /* H5_NO_DEPRECATED_SYMBOLS */ diff --git a/src/H5Fpublic.h b/src/H5Fpublic.h index 851d64d..9d6d349 100644 --- a/src/H5Fpublic.h +++ b/src/H5Fpublic.h @@ -201,6 +201,7 @@ typedef enum H5F_libver_t { /** * File space handling strategy */ +//! [H5F_fspace_strategy_t_snip] typedef enum H5F_fspace_strategy_t { H5F_FSPACE_STRATEGY_FSM_AGGR = 0, /**< Mechanisms: free-space managers, aggregators, and virtual file drivers This is the library default when not set */ @@ -210,6 +211,7 @@ typedef enum H5F_fspace_strategy_t { H5F_FSPACE_STRATEGY_NONE = 3, /**< Mechanisms: virtual file drivers */ H5F_FSPACE_STRATEGY_NTYPES /**< Sentinel */ } H5F_fspace_strategy_t; +//! [H5F_fspace_strategy_t_snip] /** * File space handling strategy for release 1.10.0 diff --git a/src/H5Ppublic.h b/src/H5Ppublic.h index 6493895..5624db9 100644 --- a/src/H5Ppublic.h +++ b/src/H5Ppublic.h @@ -111,13 +111,23 @@ extern "C" { /*******************/ /* Define property list class callback function pointer types */ +//! [H5P_cls_create_func_t_snip] typedef herr_t (*H5P_cls_create_func_t)(hid_t prop_id, void *create_data); +//! [H5P_cls_create_func_t_snip] +//! [H5P_cls_copy_func_t_snip] typedef herr_t (*H5P_cls_copy_func_t)(hid_t new_prop_id, hid_t old_prop_id, void *copy_data); +//! [H5P_cls_copy_func_t_snip] +//! [H5P_cls_close_func_t_snip] typedef herr_t (*H5P_cls_close_func_t)(hid_t prop_id, void *close_data); +//! [H5P_cls_close_func_t_snip] /* Define property list callback function pointer types */ +//! [H5P_prp_cb1_t_snip] typedef herr_t (*H5P_prp_cb1_t)(const char *name, size_t size, void *value); +//! [H5P_prp_cb1_t_snip] +//! [H5P_prp_cb2_t_snip] typedef herr_t (*H5P_prp_cb2_t)(hid_t prop_id, const char *name, size_t size, void *value); +//! [H5P_prp_cb2_t_snip] typedef H5P_prp_cb1_t H5P_prp_create_func_t; typedef H5P_prp_cb2_t H5P_prp_set_func_t; typedef H5P_prp_cb2_t H5P_prp_get_func_t; @@ -125,11 +135,15 @@ typedef herr_t (*H5P_prp_encode_func_t)(const void *value, void **buf, size_t *s typedef herr_t (*H5P_prp_decode_func_t)(const void **buf, void *value); typedef H5P_prp_cb2_t H5P_prp_delete_func_t; typedef H5P_prp_cb1_t H5P_prp_copy_func_t; +//! [H5P_prp_compare_func_t_snip] typedef int (*H5P_prp_compare_func_t)(const void *value1, const void *value2, size_t size); +//! [H5P_prp_compare_func_t_snip] typedef H5P_prp_cb1_t H5P_prp_close_func_t; /* Define property list iteration function type */ +//! [H5P_iterate_t_snip] typedef herr_t (*H5P_iterate_t)(hid_t id, const char *name, void *iter_data); +//! [H5P_iterate_t_snip] /* Actual IO mode property */ typedef enum H5D_mpio_actual_chunk_opt_mode_t { @@ -252,6 +266,77 @@ H5_DLLVAR hid_t H5P_LST_REFERENCE_ACCESS_ID_g; */ H5_DLL herr_t H5Pclose(hid_t plist_id); /** + * \ingroup GPLOA + * + * \brief Closes an existing property list class + * + * \plistcls_id{plist_id} + * + * \return \herr_t + * + * \details H5Pclose_class() removes a property list class from the library. + * Existing property lists of this class will continue to exist, + * but new ones are not able to be created. + * + * \since 1.4.0 + * + */ +H5_DLL herr_t H5Pclose_class(hid_t plist_id); +/** + * \ingroup GPLO + * + * \brief Copies an existing property list to create a new property list + * + * \plist_id + * + * \return \hid_t{property list} + * + * \details H5Pcopy() copies an existing property list to create a new + * property list. The new property list has the same properties + * and values as the original property list. + * + * \since 1.0.0 + * + */ +H5_DLL hid_t H5Pcopy(hid_t plist_id); +/** + * \ingroup GPLOA + * + * \brief Copies a property from one list or class to another + * + * \param[in] dst_id Identifier of the destination property list or class + * \param[in] src_id Identifier of the source property list or class + * \param[in] name Name of the property to copy + * + * \return \herr_t + * + * \details H5Pcopy_prop() copies a property from one property list or + * class to another. + * + * If a property is copied from one class to another, all the + * property information will be first deleted from the destination + * class and then the property information will be copied from the + * source class into the destination class. + * + * If a property is copied from one list to another, the property + * will be first deleted from the destination list (generating a + * call to the close callback for the property, if one exists) + * and then the property is copied from the source list to the + * destination list (generating a call to the copy callback for + * the property, if one exists). + * + * If the property does not exist in the class or list, this + * call is equivalent to calling H5Pregister() or H5Pinsert() (for + * a class or list, as appropriate) and the create callback will + * be called in the case of the property being copied into a list + * (if such a callback exists for the property). + * + * \since 1.6.0 + * + */ +H5_DLL herr_t H5Pcopy_prop(hid_t dst_id, hid_t src_id, const +char *name); +/** * \ingroup GPLO * * \brief Creates a new property list as an instance of a property list class @@ -374,43 +459,1352 @@ H5_DLL herr_t H5Pclose(hid_t plist_id); * \since 1.0.0 * */ -H5_DLL hid_t H5Pcreate(hid_t cls_id); -H5_DLL hid_t H5Pcreate_class(hid_t parent, const char *name, H5P_cls_create_func_t cls_create, - void *create_data, H5P_cls_copy_func_t cls_copy, void *copy_data, - H5P_cls_close_func_t cls_close, void *close_data); -H5_DLL char * H5Pget_class_name(hid_t pclass_id); -H5_DLL herr_t H5Pregister2(hid_t cls_id, const char *name, size_t size, void *def_value, - H5P_prp_create_func_t prp_create, H5P_prp_set_func_t prp_set, - H5P_prp_get_func_t prp_get, H5P_prp_delete_func_t prp_del, - H5P_prp_copy_func_t prp_copy, H5P_prp_compare_func_t prp_cmp, - H5P_prp_close_func_t prp_close); -H5_DLL herr_t H5Pinsert2(hid_t plist_id, const char *name, size_t size, void *value, - H5P_prp_set_func_t prp_set, H5P_prp_get_func_t prp_get, - H5P_prp_delete_func_t prp_delete, H5P_prp_copy_func_t prp_copy, - H5P_prp_compare_func_t prp_cmp, H5P_prp_close_func_t prp_close); -H5_DLL herr_t H5Pset(hid_t plist_id, const char *name, const void *value); -H5_DLL htri_t H5Pexist(hid_t plist_id, const char *name); -H5_DLL herr_t H5Pencode2(hid_t plist_id, void *buf, size_t *nalloc, hid_t fapl_id); +H5_DLL hid_t H5Pcreate(hid_t cls_id); +/** + * \ingroup GPLOA + * + * \brief Creates a new property list class + * + * \plistcls_id{parent} + * \param[in] name Name of property list class to register + * \param[in] create Callback routine called when a property list is + * created + * \param[in] create_data Pointer to user-defined class create data, to be + * passed along to class create callback + * \param[in] copy Callback routine called when a property list is + * copied + * \param[in] copy_data Pointer to user-defined class copy data, to be + * passed along to class copy callback + * \param[in] close Callback routine called when a property list is + * being closed + * \param[in] close_data Pointer to user-defined class close data, to be + * passed along to class close callback + * + * \return \hid_t{property list class} + * + * \details H5Pcreate_class() registers a new property list class with the + * library. The new property list class can inherit from an + * existing property list class, \p parent, or may be derived + * from the default “empty” class, NULL. New classes with + * inherited properties from existing classes may not remove + * those existing properties, only add or remove their own class + * properties. Property list classes defined and supported in the + * HDF5 library distribution are listed and briefly described in + * H5Pcreate(). The \p create routine is called when a new property + * list of this class is being created. The #H5P_cls_create_func_t + * callback function is defined as follows: + * + * \todo fix snippets to work, when you click on them. + * + * \snippet this H5P_cls_create_func_t_snip + * + * The parameters to this callback function are defined as follows: + * <table> + * <tr> + * <td>\ref hid_t \c prop_id</td> + * <td>IN: The identifier of the property list being created</td> + * </tr> + * <tr> + * <td>\Code{void * create_data}</td> + * <td>IN: User pointer to any class creation data required</td> + * </tr> + * </table> + * + * The \p create routine is called after any registered + * \p create function is called for each property value. If the + * \p create routine returns a negative value, the new list is not + * returned to the user and the property list creation routine returns + * an error value. + * + * The \p copy routine is called when an existing property + * list of this class is copied. The #H5P_cls_copy_func_t callback + * function is defined as follows: + * \snippet this H5P_cls_copy_func_t_snip + * + * The parameters to this callback function are defined as follows: + * <table> + * <tr> + * <td>\ref hid_t \c prop_id</td> + * <td>IN: The identifier of the property list created by copying</td> + * </tr> + * <tr> + * <td>\Code{void * copy_data}</td> + * <td>IN: User pointer to any class copy data required</td> + * </tr> + * </table> + * + * The \p copy routine is called after any registered \p copy function + * is called for each property value. If the \p copy routine returns a + * negative value, the new list is not returned to the user and the + * property list \p copy routine returns an error value. + * + * The \p close routine is called when a property list of this class + * is being closed. The #H5P_cls_close_func_t callback function is + * defined as follows: + * \snippet this H5P_cls_close_func_t_snip + * + * The parameters to this callback function are defined as follows: + * <table> + * <tr> + * <td>\ref hid_t \c prop_id</td> + * <td>IN: The identifier of the property list being closed</td> + * </tr> + * <tr> + * <td>\Code{void * close_data}</td> + * <td>IN: User pointer to any class close data required</td> + * </tr> + * </table> + * + * The \p close routine is called before any registered \p close + * function is called for each property value. If the \p close routine + * returns a negative value, the property list close routine returns + * an error value but the property list is still closed. + * + * H5Pclose_class() can be used to release the property list class + * identifier returned by this function so that resources leaks will + * not develop. + * + * \since 1.4.0 + * + */ +H5_DLL hid_t H5Pcreate_class(hid_t parent, const char *name, + H5P_cls_create_func_t create, void *create_data, + H5P_cls_copy_func_t copy, void *copy_data, + H5P_cls_close_func_t close, void *close_data); +/** + * \ingroup GPLO + * + * \brief Decodes property list received in a binary object buffer and + * returns a new property list identifier + * + * \param[in] buf Buffer holding the encoded property list + * + * \return \hid_tv{object} + * + * \details Given a binary property list description in a buffer, H5Pdecode() + * reconstructs the HDF5 property list and returns an identifier + * for the new property list. The binary description of the property + * list is encoded by H5Pencode(). + * + * The user is responsible for passing in the correct buffer. + * + * The property list identifier returned by this function should be + * released with H5Pclose() when the identifier is no longer needed + * so that resource leaks will not develop. + * + * \note Some properties cannot be encoded and therefore will not be available + * in the decoded property list. These properties are discussed in + * H5Pencode(). + * + * \since 1.10.0 + * + */ H5_DLL hid_t H5Pdecode(const void *buf); -H5_DLL herr_t H5Pget_size(hid_t id, const char *name, size_t *size); -H5_DLL herr_t H5Pget_nprops(hid_t id, size_t *nprops); -H5_DLL hid_t H5Pget_class(hid_t plist_id); -H5_DLL hid_t H5Pget_class_parent(hid_t pclass_id); -H5_DLL herr_t H5Pget(hid_t plist_id, const char *name, void *value); +/** + * \ingroup GPLO + * + * \brief Encodes the property values in a property list into a binary + * buffer + * + * \plist_id + * \param[out] buf Buffer into which the property list will be encoded. + * If the provided buffer is NULL, the size of the + * buffer required is returned through \p nalloc; the + * function does nothing more. + * \param[out] nalloc The size of the required buffer + * \fapl_id + * + * \return \herr_t + * + * \details H5Pencode2() encodes the property list \p plist_id into the + * binary buffer \p buf, according to the file format setting + * specified by the file access property list \p fapl_id. + * + * If the required buffer size is unknown, \p buf can be passed + * in as NULL and the function will set the required buffer size + * in \p nalloc. The buffer can then be created and the property + * list encoded with a subsequent H5Pencode2() call. + * + * If the buffer passed in is not big enough to hold the encoded + * properties, the H5Pencode2() call can be expected to fail with + * a segmentation fault. + * + * 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, H5Pencode2() proceeds as if the \a + * libver_bounds property were set to (#H5F_LIBVER_EARLIEST, + * #H5F_LIBVER_LATEST). (Functionally, H5Pencode1() is identical to + * H5Pencode2() with \a libver_bounds set to (#H5F_LIBVER_EARLIEST, + * #H5F_LIBVER_LATEST).) + * Properties that do not have encode callbacks will be skipped. + * There is currently no mechanism to register an encode callback for + * a user-defined property, so user-defined properties cannot currently + * be encoded. + * + * Some properties cannot be encoded, particularly properties that are + * reliant on local context. + * + * \note \a Motivation: + * This function was introduced in HDF5-1.12 as part of the \a H5Sencode + * format change to enable 64-bit selection encodings and a dataspace + * selection that is tied to a file. + * + * \since 1.12.0 + * + */ +H5_DLL herr_t H5Pencode2(hid_t plist_id, void *buf, size_t *nalloc, hid_t fapl_id); +/** + * \ingroup GPLOA + * + * \brief Compares two property lists or classes for equality + * + * \param[in] id1 First property object to be compared + * \param[in] id2 Second property object to be compared + * + * \return \htri_t + * + * \details H5Pequal() compares two property lists or classes to determine + * whether they are equal to one another. + * + * Either both \p id1 and \p id2 must be property lists or both + * must be classes; comparing a list to a class is an error. + * + * \since 1.4.0 + * + */ H5_DLL htri_t H5Pequal(hid_t id1, hid_t id2); +/** + * \ingroup GPLOA + * + * \brief Queries whether a property name exists in a property list or + * class + * + * \param[in] plist_id Identifier for the property list or class to query + * \param[in] name Name of property to check for + * + * \return \htri_t + * + * \details H5Pexist() determines whether a property exists within a + * property list or class. + * + * \since 1.4.0 + * + */ +H5_DLL htri_t H5Pexist(hid_t plist_id, const char *name); +/** + * \ingroup GPLOA + * + * \brief Queries the value of a property + * + * \plist_id + * \param[in] name Name of property to query + * \param[out] value Pointer to a location to which to copy the value of + * the property + * + * \return \herr_t + * + * \details H5Pget() retrieves a copy of the value for a property in a + * property list. If there is a \p get callback routine registered + * for this property, the copy of the value of the property will + * first be passed to that routine and any changes to the copy of + * the value will be used when returning the property value from + * this routine. + * + * This routine may be called for zero-sized properties with the + * \p value set to NULL. The \p get routine will be called with + * a NULL value if the callback exists. + * + * The property name must exist or this routine will fail. + * + * If the \p get callback routine returns an error, \ value will + * not be modified. + * + * \since 1.4.0 + * + */ +H5_DLL herr_t H5Pget(hid_t plist_id, const char *name, void * value); +/** + *\ingroup GPLO + * + * \brief Returns the property list class identifier for a property list + * + * \plist_id + * + * \return \hid_t{property list class} + * + * \details H5Pget_class() returns the property list class identifier for + * the property list identified by the \p plist_id parameter. + * + * Note that H5Pget_class() returns a value of #hid_t type, an + * internal HDF5 identifier, rather than directly returning a + * property list class. That identifier can then be used with + * either H5Pequal() or H5Pget_class_name() to determine which + * predefined HDF5 property list class H5Pget_class() has returned. + * + * A full list of valid predefined property list classes appears + * in the description of H5Pcreate(). + * + * Determining the HDF5 property list class name with H5Pequal() + * requires a series of H5Pequal() calls in an if-else sequence. + * An iterative sequence of H5Pequal() calls can compare the + * identifier returned by H5Pget_class() to members of the list of + * valid property list class names. A pseudo-code snippet might + * read as follows: + * + * \code + * plist_class_id = H5Pget_class (dsetA_plist); + * + * if H5Pequal (plist_class_id, H5P_OBJECT_CREATE) = TRUE; + * [ H5P_OBJECT_CREATE is the property list class ] + * [ returned by H5Pget_class. ] + * + * else if H5Pequal (plist_class_id, H5P_DATASET_CREATE) = TRUE; + * [ H5P_DATASET_CREATE is the property list class. ] + * + * else if H5Pequal (plist_class_id, H5P_DATASET_XFER) = TRUE; + * [ H5P_DATASET_XFER is the property list class. ] + * + * . + * . [ Continuing the iteration until a match is found. ] + * . + * \endcode + * + * H5Pget_class_name() returns the property list class name directly + * as a string: + * + * \code + * plist_class_id = H5Pget_class (dsetA_plist); + * plist_class_name = H5Pget_class_name (plist_class_id) + * \endcode + * + * Note that frequent use of H5Pget_class_name() can become a + * performance problem in a high-performance environment. The + * H5Pequal() approach is generally much faster. + * + * \version 1.6.0 Return type changed in this release. + * \since 1.0.0 + * + */ +H5_DLL hid_t H5Pget_class(hid_t plist_id); +/** + * \ingroup GPLOA + * + * \brief Retrieves the name of a class + * + * \plistcls_id{pclass_id} + * + * \return Returns a pointer to an allocated string containing the class + * name if successful, and NULL if not successful. + * + * \details H5Pget_class_name() retrieves the name of a generic property + * list class. The pointer to the name must be freed by the user + * with a call to H5free_memory() after each successful call. + * + * <table> + * <tr> + * <th>Class Name (class identifier) Returned</th> + * <th>Property List Class</th> + * <th>Expanded Name of the Property List Class</th> + * <th>The Class Identifier Used with H5Pcreate</th> + * <th>Comments</th> + * </tr> + * <tr> + * <td>attribute create</td> + * <td>acpl</td> + * <td>Attribute Creation Property List</td> + * <td>H5P_ATTRIBUTE_CREATE</td> + * <td> </td> + * </tr> + * <tr> + * <td>dataset access</td> + * <td>dapl</td> + * <td>Dataset Access Property List</td> + * <td>H5P_DATASET_ACCESS</td> + * <td> </td> + * </tr> + * <tr> + * <td>dataset create</td> + * <td>dcpl</td> + * <td>Dataset Creation Property List</td> + * <td>H5P_DATASET_CREATE</td> + * <td> </td> + * </tr> + * <tr> + * <td>data transfer</td> + * <td>dxpl</td> + * <td>Data Transfer Property List</td> + * <td>H5P_DATASET_XFER</td> + * <td> </td> + * </tr> + * <tr> + * <td>datatype access</td> + * <td> </td> + * <td> </td> + * <td>H5P_DATATYPE_ACCESS</td> + * <td>This class can be created, but there are no properties + * in the class currently. + * </td> + * </tr> + * <tr> + * <td>datatype create</td> + * <td> </td> + * <td> </td> + * <td>H5P_DATATYPE_CREATE</td> + * <td>This class can be created, but there + * are no properties in the class currently.</td> + * </tr> + * <tr> + * <td>file access</td> + * <td>fapl</td> + * <td>File Access Property List</td> + * <td>H5P_FILE_ACCESS</td> + * <td> </td> + * </tr> + * <tr> + * <td>file create</td> + * <td>fcpl</td> + * <td>File Creation Property List</td> + * <td>H5P_FILE_CREATE</td> + * <td> </td> + * </tr> + * <tr> + * <td>file mount</td> + * <td>fmpl</td> + * <td>File Mount Property List</td> + * <td>H5P_FILE_MOUNT</td> + * <td> </td> + * </tr> + * <tr> + * <td>group access</td> + * <td> </td> + * <td> </td> + * <td>H5P_GROUP_ACCESS</td> + * <td>This class can be created, but there + * are no properties in the class currently.</td> + * </tr> + * <tr> + * <td>group create</td> + * <td>gcpl</td> + * <td>Group Creation Property List</td> + * <td>H5P_GROUP_CREATE</td> + * <td> </td> + * </tr> + * <tr> + * <td>link access</td> + * <td>lapl</td> + * <td>Link Access Property List</td> + * <td>H5P_LINK_ACCESS</td> + * <td> </td> + * </tr> + * <tr> + * <td>link create</td> + * <td>lcpl</td> + * <td>Link Creation Property List</td> + * <td>H5P_LINK_CREATE</td> + * <td> </td> + * </tr> + * <tr> + * <td>object copy</td> + * <td>ocpypl</td> + * <td>Object Copy Property List</td> + * <td>H5P_OBJECT_COPY</td> + * <td> </td> + * </tr> + * <tr> + * <td>object create</td> + * <td>ocpl</td> + * <td>Object Creation Property List</td> + * <td>H5P_OBJECT_CREATE</td> + * <td> </td> + * </tr> + * <tr> + * <td>string create</td> + * <td>strcpl</td> + * <td>String Creation Property List</td> + * <td>H5P_STRING_CREATE</td> + * <td> </td> + * </tr> + * </table> + * + * \since 1.4.0 + * + */ +H5_DLL char *H5Pget_class_name(hid_t pclass_id); +/** + * \ingroup GPLOA + * + * \brief Retrieves the parent class of a property class + * + * \plistcls_id{pclass_id} + * + * \return \hid_t{parent class object} + * + * \details H5Pget_class_parent() retrieves an identifier for the parent + * class of a property class. + * + * \since 1.4.0 + * + */ +H5_DLL hid_t H5Pget_class_parent(hid_t pclass_id); +/** + * \ingroup GPLOA + * + * \brief Queries the number of properties in a property list or class + * + * \param[in] id Identifier for property object to query + * \param[out] nprops Number of properties in object + * + * \return \herr_t + * + * \details H5Pget_nprops() retrieves the number of properties in a + * property list or property list class. + * + * If \p id is a property list identifier, the current number of + * properties in the list is returned in \p nprops. + * + * If \p id is a property list class identifier, the number of + * registered properties in the class is returned in \p nprops. + * + * \since 1.4.0 + * + */ +H5_DLL herr_t H5Pget_nprops(hid_t id, size_t *nprops); +/** + * \ingroup GPLOA + * + * \brief Queries the size of a property value in bytes + * + * \param[in] id Identifier of property object to query + * \param[in] name Name of property to query + * \param[out] size Size of property in bytes + * + * \return \herr_t + * + * \details H5Pget_size() retrieves the size of a property's value in + * bytes. This function operates on both property lists and + * property classes. + * + * Zero-sized properties are allowed and return 0. + * + * \since 1.4.0 + * + */ +H5_DLL herr_t H5Pget_size(hid_t id, const char *name, size_t *size); +/** + * \ingroup GPLOA + * + * \brief Registers a temporary property with a property list + * + * \plist_id + * \param[in] name Name of property to create + * \param[in] size Size of property in bytes + * \param[in] value Initial value for the property + * \param[in] set Callback routine called before a new value is copied + * into the property's value + * \param[in] get Callback routine called when a property value is + * retrieved from the property + * \param[in] prp_del Callback routine called when a property is deleted + * from a property list + * \param[in] copy Callback routine called when a property is copied + * from an existing property list + * \param[in] compare Callback routine called when a property is compared + * with another property list + * \param[in] close Callback routine called when a property list is + * being closed and the property value will be disposed + * of + * + * \return \herr_t + * + * \details H5Pinsert2() creates a new property in a property + * list. The property will exist only in this property list and + * copies made from it. + * + * The initial property value must be provided in \p value and + * the property value will be set accordingly. + * + * The name of the property must not already exist in this list, + * or this routine will fail. + * + * The \p set and \p get callback routines may be set to NULL + * if they are not needed. + * + * Zero-sized properties are allowed and do not store any data + * in the property list. The default value of a zero-size + * property may be set to NULL. They may be used to indicate the + * presence or absence of a particular piece of information. + * + * The \p set routine is called before a new value is copied + * into the property. The #H5P_prp_set_func_t callback function + * is defined as follows: + * \snippet this H5P_prp_cb2_t_snip + * + * The parameters to the callback function are defined as follows: + * <table> + * <tr> + * <td>\ref hid_t \c prop_id</td> + * <td>IN: The identifier of the property list being + * modified</td> + * </tr> + * <tr> + * <td>\Code{const char * name}</td> + * <td>IN: The name of the property being modified</td> + * </tr> + * <tr> + * <td>\Code{size_t size}</td> + * <td>IN: The size of the property in bytes</td> + * </tr> + * <tr> + * <td>\Code{void * value}</td> + * <td>IN: Pointer to new value pointer for the property + * being modified</td> + * </tr> + * </table> + * + * The \p set routine may modify the value pointer to be set and + * those changes will be used when setting the property's value. + * If the \p set routine returns a negative value, the new property + * value is not copied into the property and the \p set routine + * returns an error value. The \p set routine will be called for + * the initial value. + * + * \b Note: The \p set callback function may be useful to range + * check the value being set for the property or may perform some + * transformation or translation of the value set. The \p get + * callback would then reverse the transformation or translation. + * A single \p get or \p set callback could handle multiple + * properties by performing different actions based on the + * property name or other properties in the property list. + * + * The \p get routine is called when a value is retrieved from + * a property value. The #H5P_prp_get_func_t callback function + * is defined as follows: + * + * \snippet this H5P_prp_cb2_t_snip + * + * The parameters to the above callback function are: + * + * <table> + * <tr> + * <td>\ref hid_t \c prop_id</td> + * <td>IN: The identifier of the property list being queried</td> + * </tr> + * <tr> + * <td>\Code{const char * name}</td> + * <td>IN: The name of the property being queried</td> + * </tr> + * <tr> + * <td>\Code{size_t size}</td> + * <td>IN: The size of the property in bytes</td> + * </tr> + * <tr> + * <td>\Code{void * value}</td> + * <td>IN: The value of the property being returned</td> + * </tr> + * </table> + * + * The \p get routine may modify the value to be returned from + * the query and those changes will be preserved. If the \p get + * routine returns a negative value, the query routine returns + * an error value. + * + * The \p prp_del routine is called when a property is being + * deleted from a property list. The #H5P_prp_delete_func_t + * callback function is defined as follows: + * + * \snippet this H5P_prp_cb2_t_snip + * + * The parameters to the above callback function are: + * + * <table> + * <tr> + * <td>\ref hid_t \c prop_id</td> + * <td>IN: The identifier of the property list the property is + * being deleted from</td> + * </tr> + * <tr> + * <td>\Code{const char * name}</td> + * <td>IN: The name of the property in the list</td> + * </tr> + * <tr> + * <td>\Code{size_t size}</td> + * <td>IN: The size of the property in bytes</td> + * </tr> + * <tr> + * <td>\Code{void * value}</td> + * <td>IN: The value for the property being deleted</td> + * </tr> + * </table> + * + * The \p prp_del routine may modify the value passed in, but the + * value is not used by the library when the \p prp_del routine + * returns. If the \p prp_del routine returns a negative value, + * the property list \p prp_del routine returns an error value but + * the property is still deleted. + * + * The \p copy routine is called when a new property list with + * this property is being created through a \p copy operation. + * + * The #H5P_prp_copy_func_t callback function is defined as follows: + * + * \snippet this H5P_prp_cb1_t_snip + * + * The parameters to the above callback function are: + * <table> + * <tr> + * <td>\Code{const char * name}</td> + * <td>IN: The name of the property being copied</td> + * </tr> + * <tr> + * <td>\Code{size_t size}</td> + * <td>IN: The size of the property in bytes</td> + * </tr> + * <tr> + * <td>\Code{void * value}</td> + * <td>IN/OUT: The value for the property being copied</td> + * </tr> + * </table> + * + * The \p copy routine may modify the value to be set and those + * changes will be stored as the new value of the property. If the + * \p copy routine returns a negative value, the new property value + * is not copied into the property and the copy routine returns an + * error value. + * + * The \p compare routine is called when a property list with this + * property is compared to another property list with the same + * property. + * + * The #H5P_prp_compare_func_t callback function is defined as + * follows: + * + * \snippet this H5P_prp_compare_func_t_snip + * + * The parameters to the callback function are defined as follows: + * + * <table> + * <tr> + * <td>\Code{const void * value1}</td> + * <td>IN: The value of the first property to compare</td> + * </tr> + * <tr> + * <td>\Code{const void * value2}</td> + * <td>IN: The value of the second property to compare</td> + * </tr> + * <tr> + * <td>\Code{size_t size}</td> + * <td>IN: The size of the property in bytes</td> + * </tr> + * </table> + * + * The \p compare routine may not modify the values. The \p compare + * routine should return a positive value if \p value1 is greater + * than \p value2, a negative value if \p value2 is greater than + * \p value1 and zero if \p value1 and \p value2 are equal. + * + * The \p close routine is called when a property list with this + * property is being closed. + * + * The #H5P_prp_close_func_t callback function is defined as follows: + * \snippet this H5P_prp_cb1_t_snip + * + * The parameters to the callback function are defined as follows: + * + * <table> + * <tr> + * <td>\Code{const char * name}</td> + * <td>IN: The name of the property in the list</td> + * </tr> + * <tr> + * <td>\Code{size_t size}</td> + * <td>IN: The size of the property in bytes</td> + * </tr> + * <tr> + * <td>\Code{void * value}</td> + * <td>IN: The value for the property being closed</td> + * </tr> + * </table> + * + * The \p close routine may modify the value passed in, the + * value is not used by the library when the close routine + * returns. If the \p close routine returns a negative value, + * the property list \p close routine returns an error value + * but the property list is still closed. + * + * \b Note: There is no \p create callback routine for temporary + * property list objects; the initial value is assumed to + * have any necessary setup already performed on it. + * + * \todo "cpp_note" goes here + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pinsert2(hid_t plist_id, const char *name, size_t size, + void *value, H5P_prp_set_func_t set, H5P_prp_get_func_t get, + H5P_prp_delete_func_t prp_del, H5P_prp_copy_func_t copy, + H5P_prp_compare_func_t compare, H5P_prp_close_func_t close); +/** + * \ingroup GPLOA + * + * \brief Determines whether a property list is a member of a class + * + * \plist_id + * \plistcls_id{pclass_id} + * + * \return \htri_t + * + * \details H5Pisa_class() checks to determine whether the property list + * \p plist_id is a member of the property list class + * \p pclass_id. + * + * \see H5Pcreate() + * + * \since 1.6.0 + * + */ H5_DLL htri_t H5Pisa_class(hid_t plist_id, hid_t pclass_id); -H5_DLL int H5Piterate(hid_t id, int *idx, H5P_iterate_t iter_func, void *iter_data); -H5_DLL herr_t H5Pcopy_prop(hid_t dst_id, hid_t src_id, const char *name); +/** + * \ingroup GPLOA + * + * \brief Iterates over properties in a property class or list + * + * \param[in] id Identifier of property object to iterate over + * \param[in,out] idx Index of the property to begin with + * \param[in] iter_func Function pointer to function to be called + * with each property iterated over + * \param[in,out] iter_data Pointer to iteration data from user + * + * \return On success: the return value of the last call to \p iter_func if + * it was non-zero; zero if all properties have been processed. + * On Failure, a negative value + * + * \details H5Piterate() iterates over the properties in the property + * object specified in \p id, which may be either a property + * list or a property class, performing a specified operation + * on each property in turn. + * + * For each property in the object, \p iter_func and the + * additional information specified below are passed to the + * #H5P_iterate_t operator function. + * + * The iteration begins with the \p idx-th property in the + * object; the next element to be processed by the operator + * is returned in \p idx. If \p idx is NULL, the iterator + * starts at the first property; 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 the #H5P_iterate_t operator is as follows: + * \snippet this H5P_iterate_t_snip + * + * The operation receives the property list or class + * identifier for the object being iterated over, \p id, the + * name of the current property within the object, \p name, + * and the pointer to the operator data passed in to H5Piterate(), + * \p iter_data. The valid return values from an operator are + * as follows: + * + * <table> + * <tr> + * <td>Zero</td> + * <td>Causes the iterator to continue, returning zero when all + * properties have been processed</td> + * </tr> + * <tr> + * <td>Positive</td> + * <td>Causes the iterator to immediately return that positive + * value, indicating short-circuit success. The iterator + * can be restarted at the index of the next property</td> + * </tr> + * <tr> + * <td>Negative</td> + * <td>Causes the iterator to immediately return that value, + * indicating failure. The iterator can be restarted at the + * index of the next property</td> + * </tr> + * </table> + * H5Piterate() assumes that the properties in the object + * identified by \p id remain unchanged through the iteration. + * If the membership changes during the iteration, the function's + * behavior is undefined. + * + * + * \todo "cpp_note" goes here + * + * \since 1.4.0 + * + */ +H5_DLL int H5Piterate(hid_t id, int *idx, H5P_iterate_t iter_func, + void *iter_data); +/** + * \ingroup GPLOA + * + * \brief Registers a permanent property with a property list class + * + * \plistcls_id{cls_id} + * \param[in] name Name of property to register + * \param[in] size Size of property in bytes + * \param[in] def_value Default value for property in newly created + * property lists + * \param[in] create Callback routine called when a property list is + * being created and the property value will be + * initialized + * \param[in] set Callback routine called before a new value is + * copied into the property's value + * \param[in] get Callback routine called when a property value is + * retrieved from the property + * \param[in] prp_del Callback routine called when a property is deleted + * from a property list + * \param[in] copy Callback routine called when a property is copied + * from a property list + * \param[in] compare Callback routine called when a property is compared + * with another property list + * \param[in] close Callback routine called when a property list is + * being closed and the property value will be + * disposed of + * + * \return \herr_t + * + * \details H5Pregister2() registers a new property with a property list + * class. The \p cls_id identifier can be obtained by calling + * H5Pcreate_class(). The property will exist in all property + * list objects of \p cl_id created after this routine finishes. The + * name of the property must not already exist, or this routine + * will fail. The default property value must be provided and all + * new property lists created with this property will have the + * property value set to the default value. Any of the callback + * routines may be set to NULL if they are not needed. + * + * Zero-sized properties are allowed and do not store any data in + * the property list. These may be used as flags to indicate the + * presence or absence of a particular piece of information. The + * default pointer for a zero-sized property may be set to NULL. + * The property \p create and \p close callbacks are called for + * zero-sized properties, but the \p set and \p get callbacks are + * never called. + * + * The \p create routine is called when a new property list with + * this property is being created. The #H5P_prp_create_func_t + * callback function is defined as follows: + * + * \snippet this H5P_prp_cb1_t_snip + * + * The parameters to this callback function are defined as follows: + * + * <table> + * <tr> + * <td>\Code{const char * name}</td> + * <td>IN: The name of the property being modified</td> + * </tr> + * <tr> + * <td>\Code{size_t size}</td> + * <td>IN: The size of the property in bytes</td> + * </tr> + * <tr> + * <td>\Code{void * value}</td> + * <td>IN/OUT: The default value for the property being created, + * which will be passed to H5Pregister2()</td> + * </tr> + * </table> + * + * The \p create routine may modify the value to be set and those + * changes will be stored as the initial value of the property. + * If the \p create routine returns a negative value, the new + * property value is not copied into the property and the + * \p create routine returns an error value. + * + * The \p set routine is called before a new value is copied into + * the property. The #H5P_prp_set_func_t callback function is defined + * as follows: + * + * \snippet this H5P_prp_cb2_t_snip + * + * The parameters to this callback function are defined as follows: + * + * <table> + * <tr> + * <td>\ref hid_t \c prop_id</td> + * <td>IN: The identifier of the property list being modified</td> + * </tr> + * <tr> + * <td>\Code{const char * name}</td> + * <td>IN: The name of the property being modified</td> + * </tr> + * <tr> + * <td>\Code{size_t size}</td> + * <td>IN: The size of the property in bytes</td> + * </tr> + * <tr> + * <td>\Code{void *value}</td> + * <td>IN/OUT: Pointer to new value pointer for the property + * being modified</td> + * </tr> + * </table> + * + * The \p set routine may modify the value pointer to be set and + * those changes will be used when setting the property's value. + * If the \p set routine returns a negative value, the new property + * value is not copied into the property and the \p set routine + * returns an error value. The \p set routine will not be called + * for the initial value; only the \p create routine will be called. + * + * \b Note: The \p set callback function may be useful to range + * check the value being set for the property or may perform some + * transformation or translation of the value set. The \p get + * callback would then reverse the transformation or translation. + * A single \p get or \p set callback could handle multiple + * properties by performing different actions based on the property + * name or other properties in the property list. + * + * The \p get routine is called when a value is retrieved from a + * property value. The #H5P_prp_get_func_t callback function is + * defined as follows: + * + * \snippet this H5P_prp_cb2_t_snip + * + * The parameters to the callback function are defined as follows: + * + * <table> + * <tr> + * <td>\ref hid_t \c prop_id</td> + * <td>IN: The identifier of the property list being + * queried</td> + * </tr> + * <tr> + * <td>\Code{const char * name}</td> + * <td>IN: The name of the property being queried</td> + * </tr> + * <tr> + * <td>\Code{size_t size}</td> + * <td>IN: The size of the property in bytes</td> + * </tr> + * <tr> + * <td>\Code{void * value}</td> + * <td>IN/OUT: The value of the property being returned</td> + * </tr> + * </table> + * + * The \p get routine may modify the value to be returned from the + * query and those changes will be returned to the calling routine. + * If the \p set routine returns a negative value, the query + * routine returns an error value. + * + * The \p prp_del routine is called when a property is being + * deleted from a property list. The #H5P_prp_delete_func_t + * callback function is defined as follows: + * + * \snippet this H5P_prp_cb2_t_snip + * + * The parameters to the callback function are defined as follows: + * + * <table> + * <tr> + * <td>\ref hid_t \c prop_id</td> + * <td>IN: The identifier of the property list the property is + * being deleted from</td> + * </tr> + * <tr> + * <td>\Code{const char * name}</td> + * <td>IN: The name of the property in the list</td> + * </tr> + * <tr> + * <td>\Code{size_t size}</td> + * <td>IN: The size of the property in bytes</td> + * </tr> + * <tr> + * <td>\Code{void * value}</td> + * <td>IN: The value for the property being deleted</td> + * </tr> + * </table> + * + * The \p prp_del routine may modify the value passed in, but the + * value is not used by the library when the \p prp_del routine + * returns. If the \p prp_del routine returns a negative value, + * the property list delete routine returns an error value but + * the property is still deleted. + * + * The \p copy routine is called when a new property list with + * this property is being created through a \p copy operation. + * The #H5P_prp_copy_func_t callback function is defined as follows: + * + * \snippet this H5P_prp_cb1_t_snip + * + * The parameters to the callback function are defined as follows: + * + * <table> + * <tr> + * <td>\Code{const char * name}</td> + * <td>IN: The name of the property being copied</td> + * </tr> + * <tr> + * <td>\Code{size_t size}</td> + * <td>IN: The size of the property in bytes</td> + * </tr> + * <tr> + * <td>\Code{void * value}</td> + * <td>IN/OUT: The value for the property being copied</td> + * </tr> + * </table> + * + * The \p copy routine may modify the value to be set and those + * changes will be stored as the new value of the property. If + * the \p copy routine returns a negative value, the new + * property value is not copied into the property and the \p copy + * routine returns an error value. + * + * The \p compare routine is called when a property list with this + * property is compared to another property list with the same + * property. The #H5P_prp_compare_func_t callback function is + * defined as follows: + * + * \snippet this H5P_prp_compare_func_t_snip + * + * The parameters to the callback function are defined as follows: + * + * <table> + * <tr> + * <td>\Code{const void * value1}</td> + * <td>IN: The value of the first property to compare</td> + * </tr> + * <tr> + * <td>\Code{const void * value2}</td> + * <td>IN: The value of the second property to compare</td> + * </tr> + * <tr> + * <td>\Code{size_t size}</td> + * <td>IN: The size of the property in bytes</td> + * </tr> + * </table> + * + * The \p compare routine may not modify the values. The \p compare + * routine should return a positive value if \p value1 is greater + * than \p value2, a negative value if \p value2 is greater than + * \p value1 and zero if \p value1 and \p value2 are equal. + * + * The \p close routine is called when a property list with this + * property is being closed. The #H5P_prp_close_func_t callback + * function is defined as follows: + * + * \snippet this H5P_prp_cb2_t_snip + * + * The parameters to the callback function are defined as follows: + * + * <table> + * <tr> + * <td>\ref hid_t \c prop_id</td> + * <td>IN: The identifier of the property list being closed</td> + * </tr> + * <tr> + * <td>\Code{const char * name}</td> + * <td>IN: The name of the property in the list</td> + * </tr> + * <tr> + * <td>\Code{size_t size}</td> + * <td>IN: The size of the property in bytes</td> + * </tr> + * <tr> + * <td>\Code{void * value}</td> + * <td>IN: The value for the property being closed</td> + * </tr> + * </table> + * + * The \p close routine may modify the value passed in, but the + * value is not used by the library when the \p close routine returns. + * If the \p close routine returns a negative value, the property + * list close routine returns an error value but the property list is + * still closed. + * + * \todo "cpp_note" goes here + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pregister2(hid_t cls_id, const char *name, size_t size, + void *def_value, H5P_prp_create_func_t create, + H5P_prp_set_func_t set, H5P_prp_get_func_t get, + H5P_prp_delete_func_t prp_del, H5P_prp_copy_func_t copy, + H5P_prp_compare_func_t compare, H5P_prp_close_func_t close); +/** + * \ingroup GPLOA + * + * \brief Removes a property from a property list + * + * \plist_id + * \param[in] name Name of property to remove + * + * \return \herr_t + * + * \details H5Premove() removes a property from a property list. Both + * properties which were in existence when the property list was + * created (i.e. properties registered with H5Pregister()) and + * properties added to the list after it was created (i.e. added + * with H5Pinsert1() may be removed from a property list. + * Properties do not need to be removed from a property list + * before the list itself is closed; they will be released + * automatically when H5Pclose() is called. + * + * If a \p close callback exists for the removed property, it + * will be called before the property is released. + * + * \since 1.4.0 + * + */ H5_DLL herr_t H5Premove(hid_t plist_id, const char *name); +/** + * \ingroup GPLOA + * + * \brief Sets a property list value + * + * \plist_id + * \param[in] name Name of property to modify + * \param[in] value Pointer to value to set the property to + * + * \return \herr_t + * + * \details H5Pset() sets a new value for a property in a property list. + * If there is a \p set callback routine registered for this + * property, the \p value will be passed to that routine and any + * changes to the \p value will be used when setting the property + * value. The information pointed to by the \p value pointer + * (possibly modified by the \p set callback) is copied into the + * property list value and may be changed by the application + * making the H5Pset() call without affecting the property value. + * + * The property name must exist or this routine will fail. + * + * If the \p set callback routine returns an error, the property + * value will not be modified. + * + * This routine may not be called for zero-sized properties and + * will return an error in that case. + * + * \since 1.4.0 + * + */ +H5_DLL herr_t H5Pset(hid_t plist_id, const char *name, const void *value); +/** + * \ingroup GPLOA + * + * \brief Removes a property from a property list class + * + * \plistcls_id{pclass_id} + * \param[in] name Name of property to remove + * + * \return \herr_t + * + * \details H5Punregister() removes a property from a property list class. + * Future property lists created of that class will not contain + * this property; existing property lists containing this property + * are not affected. + * + * \since 1.4.0 + * + */ H5_DLL herr_t H5Punregister(hid_t pclass_id, const char *name); -H5_DLL herr_t H5Pclose_class(hid_t plist_id); -H5_DLL hid_t H5Pcopy(hid_t plist_id); /* Object creation property list (OCPL) routines */ /** * \ingroup OCPL * + * \brief Verifies that all required filters are available + * + * \plist_id + * + * \return \htri_t + * + * \details H5Pall_filters_avail() verifies that all of the filters set in + * the dataset or group creation property list \p plist_id are + * currently available. + * + * \version 1.8.5 Function extended to work with group creation property + * lists. + * \since 1.6.0 + * + */ +H5_DLL htri_t H5Pall_filters_avail(hid_t plist_id); +/** + * \ingroup OCPL + * + * \brief Retrieves tracking and indexing settings for attribute creation + * order + * + * \plist_id + * \param[out] crt_order_flags Flags specifying whether to track and + * index attribute creation order + * + * \return \herr_t + * + * \details H5Pget_attr_creation_order() retrieves the settings for + * tracking and indexing attribute creation order on an object. + * + * \p plist_id is an object creation property list (\p ocpl), + * as it can be a dataset or group creation property list + * identifier. The term \p ocpl is used when different types + * of objects may be involved. + * + * \p crt_order_flags returns flags with the following meanings: + * + * <table> + * <tr> + * <td>#H5P_CRT_ORDER_TRACKED</td> + * <td>Attribute creation order is tracked but not necessarily + * indexed.</td> + * </tr> + * <tr> + * <td>#H5P_CRT_ORDER_INDEXED </td> + * <td>Attribute creation order is indexed (requires + * #H5P_CRT_ORDER_TRACKED).</td> + * </tr> + * </table> + * + * If \p crt_order_flags is returned with a value of 0 (zero), + * attribute creation order is neither tracked nor indexed. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pget_attr_creation_order(hid_t plist_id, unsigned *crt_order_flags); +/** + * \ingroup OCPL + * + * \brief Retrieves attribute storage phase change thresholds + * + * \plist_id + * \param[out] max_compact Maximum number of attributes to be stored in + * compact storage (Default: 8) + * \param[out] min_dense Minimum number of attributes to be stored in + * dense storage (Default: 6) + * + * \return \herr_t + * + * \details H5Pget_attr_phase_change() retrieves threshold values for + * attribute storage on an object. These thresholds determine the + * point at which attribute storage changes from compact storage + * (i.e., storage in the object header) to dense storage (i.e., + * storage in a heap and indexed with a B-tree). + * + * In the general case, attributes are initially kept in compact + * storage. When the number of attributes exceeds \p max_compact, + * attribute storage switches to dense storage. If the number of + * attributes subsequently falls below \p min_dense, the + * attributes are returned to compact storage. + * + * If \p max_compact is set to 0 (zero), dense storage always used. + * + * \p plist_id is an object creation property list (\p ocpl), as it + * can be a dataset or group creation property list identifier. + * The term \p ocpl is used when different types of objects may be + * involved. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pget_attr_phase_change(hid_t plist_id, unsigned *max_compact, unsigned *min_dense); +/** + * \ingroup OCPL + * * \brief Returns information about a filter in a pipeline * * \todo Signature for H5Pget_filter2 is different in H5Pocpl.c than in @@ -472,103 +1866,2098 @@ H5_DLL hid_t H5Pcopy(hid_t plist_id); * \since 1.8.0 * */ -H5_DLL H5Z_filter_t H5Pget_filter2(hid_t plist_id, unsigned idx, unsigned int *flags /*out*/, - size_t *cd_nelmts /*out*/, unsigned cd_values[] /*out*/, size_t namelen, - char name[], unsigned *filter_config /*out*/); -H5_DLL herr_t H5Pset_attr_phase_change(hid_t plist_id, unsigned max_compact, unsigned min_dense); -H5_DLL herr_t H5Pget_attr_phase_change(hid_t plist_id, unsigned *max_compact, unsigned *min_dense); -H5_DLL herr_t H5Pset_attr_creation_order(hid_t plist_id, unsigned crt_order_flags); -H5_DLL herr_t H5Pget_attr_creation_order(hid_t plist_id, unsigned *crt_order_flags); -H5_DLL herr_t H5Pset_obj_track_times(hid_t plist_id, hbool_t track_times); -H5_DLL herr_t H5Pget_obj_track_times(hid_t plist_id, hbool_t *track_times); -H5_DLL herr_t H5Pmodify_filter(hid_t plist_id, H5Z_filter_t filter, unsigned int flags, size_t cd_nelmts, - const unsigned int cd_values[/*cd_nelmts*/]); -H5_DLL herr_t H5Pset_filter(hid_t plist_id, H5Z_filter_t filter, unsigned int flags, size_t cd_nelmts, - const unsigned int c_values[]); -H5_DLL int H5Pget_nfilters(hid_t plist_id); -H5_DLL herr_t H5Pget_filter_by_id2(hid_t plist_id, H5Z_filter_t id, unsigned int *flags /*out*/, - size_t *cd_nelmts /*out*/, unsigned cd_values[] /*out*/, size_t namelen, - char name[] /*out*/, unsigned *filter_config /*out*/); -H5_DLL htri_t H5Pall_filters_avail(hid_t plist_id); +H5_DLL H5Z_filter_t H5Pget_filter2(hid_t plist_id, unsigned idx, + unsigned int *flags/*out*/, + size_t *cd_nelmts/*out*/, + unsigned cd_values[]/*out*/, + size_t namelen, char name[], + unsigned *filter_config /*out*/); +/** + * \ingroup OCPL + * + * \brief Returns information about the specified filter + * + * \plist_id + * \param[in] filter_id Filter identifier + * \param[out] flags Bit vector specifying certain general + * properties of the filter + * \param[in,out] cd_nelmts Number of elements in \p cd_values + * \param[out] cd_values[] Auxiliary data for the filter + * \param[in] namelen Length of filter name and number of + * elements in \p name + * \param[out] name[] Name of filter + * \param[out] filter_config Bit field, as described in + * H5Zget_filter_info() + * + * \return \herr_t + * + * \details H5Pget_filter_by_id2() returns information about the filter + * specified in \p filter_id, a filter identifier. + * + * \p plist_id must be a dataset or group creation property list + * and \p filter_id must be in the associated filter pipeline. + * + * The \p filter_id and \p flags parameters are used in the same + * manner as described in the discussion of H5Pset_filter(). + * + * Aside from the fact that they are used for output, the + * parameters \p cd_nelmts and \p cd_values[] are used in the same + * manner as described in the discussion of H5Pset_filter(). On + * input, the \p cd_nelmts parameter indicates the number of + * entries in the \p cd_values[] array allocated by the calling + * program; on exit it contains the number of values defined by + * the filter. + * + * On input, the \p namelen parameter indicates the number of + * characters allocated for the filter name by the calling program + * in the array \p name[]. On exit \p name[] contains the name of the + * filter with one character of the name in each element of the + * array. + * + * \p filter_config is the bit field described in + * H5Zget_filter_info(). + * + * If the filter specified in \p filter_id is not set for the + * property list, an error will be returned and + * H5Pget_filter_by_id2() will fail. + * + * \version 1.8.5 Function extended to work with group creation property + * lists. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pget_filter_by_id2(hid_t plist_id, H5Z_filter_t filter_id, + unsigned int *flags/*out*/, size_t *cd_nelmts/*out*/, + unsigned cd_values[]/*out*/, size_t namelen, char name[]/*out*/, + unsigned *filter_config/*out*/); +/** + * \ingroup OCPL + * + * \brief Returns the number of filters in the pipeline + * + * \todo Signature for H5Pget_nfilters() is different in H5Pocpl.c than in + * H5Ppublic.h. + * + * \plist_id + * + * \return Returns the number of filters in the pipeline if successful; + * otherwise returns a negative value. + * + * \details H5Pget_nfilters() returns the number of filters defined in the + * filter pipeline associated with the property list \p plist_id. + * + * In each pipeline, the filters are numbered from 0 through N-1, + * where N is the value returned by this function. During output to + * the file, the filters are applied in increasing order; during + * input from the file, they are applied in decreasing order. + * + * H5Pget_nfilters() returns the number of filters in the pipeline, + * including zero (0) if there are none. + * + * \since 1.0.0 + * + */ +H5_DLL int H5Pget_nfilters(hid_t plist_id); +/** + * \ingroup OCPL + * + * \brief Determines whether times associated with an object + * are being recorded + * + * \plist_id + * \param[out] track_times Boolean value, 1 (TRUE) or 0 (FALSE), + * specifying whether object times are being recorded + * + * \return \herr_t + * + * \details H5Pget_obj_track_times() queries the object creation property + * list, \p plist_id, to determine whether object times are being + * recorded. + * + * If \p track_times is returned as 1, times are being recorded; + * if \p track_times is returned as 0, times are not being + * recorded. + * + * Time data can be retrieved with H5Oget_info(), which will return + * it in the #H5O_info_t struct. + * + * If times are not tracked, they will be reported as follows + * when queried: 12:00 AM UDT, Jan. 1, 1970 + * + * See H5Pset_obj_track_times() for further discussion. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pget_obj_track_times(hid_t plist_id, hbool_t *track_times); +/** + * \ingroup OCPL + * + * \brief Modifies a filter in the filter pipeline + * + * \plist_id + * \param[in] filter Filter to be modified + * \param[in] flags Bit vector specifying certain general properties + * of the filter + * \param[in] cd_nelmts Number of elements in \p cd_values + * \param[in] cd_values[] Auxiliary data for the filter + * + * \return \herr_t + * + * \details H5Pmodify_filter() modifies the specified \p filter in the + * filter pipeline. \p plist_id must be a dataset or group + * creation property list. + * + * The \p filter, \p flags \p cd_nelmts[], and \p cd_values + * parameters are used in the same manner and accept the same + * values as described in the discussion of H5Pset_filter(). + * + * \version 1.8.5 Function extended to work with group creation property + * lists. + * \since 1.6.0 + * + */ +H5_DLL herr_t H5Pmodify_filter(hid_t plist_id, H5Z_filter_t filter, + unsigned int flags, size_t cd_nelmts, + const unsigned int cd_values[/*cd_nelmts*/]); +/** + * \ingroup OCPL + * + * \brief Delete one or more filters in the filter pipeline + * + * \plist_id + * \param[in] filter Filter to be deleted + * + * \return \herr_t + * + * \details H5Premove_filter() removes the specified \p filter from the + * filter pipeline in the dataset or group creation property + * list \p plist_id. + * + * The \p filter parameter specifies the filter to be removed. + * Valid values for use in \p filter are as follows: + * + * <table> + * <tr> + * <td>#H5Z_FILTER_ALL</td> + * <td>Removes all filters from the filter pipeline</td> + * </tr> + * <tr> + * <td>#H5Z_FILTER_DEFLATE</td> + * <td>Data compression filter, employing the gzip + * algorithm</td> + * </tr> + * <tr> + * <td>#H5Z_FILTER_SHUFFLE</td> + * <td>Data shuffling filter</td> + * </tr> + * <tr> + * <td>#H5Z_FILTER_FLETCHER32</td> + * <td>Error detection filter, employing the Fletcher32 + * checksum algorithm</td> + * </tr> + * <tr> + * <td>#H5Z_FILTER_SZIP</td> + * <td>Data compression filter, employing the SZIP + * algorithm</td> + * </tr> + * <tr> + * <td>#H5Z_FILTER_NBIT</td> + * <td>Data compression filter, employing the N-Bit + * algorithm</td> + * </tr> + * <tr> + * <td>#H5Z_FILTER_SCALEOFFSET</td> + * <td>Data compression filter, employing the scale-offset + * algorithm</td> + * </tr> + * </table> + * + * Additionally, user-defined filters can be removed with this + * routine by passing the filter identifier with which they were + * registered with the HDF5 library. + * + * Attempting to remove a filter that is not in the filter + * pipeline is an error. + * + * \version 1.8.5 Function extended to work with group creation property + * lists. + * \since 1.6.3 + * + */ H5_DLL herr_t H5Premove_filter(hid_t plist_id, H5Z_filter_t filter); -H5_DLL herr_t H5Pset_deflate(hid_t plist_id, unsigned aggression); +/** + * \ingroup OCPL + * + * \brief Sets tracking and indexing of attribute creation order + * + * \plist_id + * \param[in] crt_order_flags Flags specifying whether to track and index + * attribute creation order. \em Default: No + * flag set; attribute creation order is neither + * tracked not indexed + * + * \return \herr_t + * + * \details H5Pset_attr_creation_order() sets flags for tracking and + * indexing attribute creation order on an object. + * + * \p plist_id is a dataset or group creation property list + * identifier. + * + * \p crt_order_flags contains flags with the following meanings: + * + * <table> + * <tr> + * <td>#H5P_CRT_ORDER_TRACKED</td> + * <td>Attribute creation order is tracked but not necessarily + * indexed.</td> + * </tr> + * <tr> + * <td>#H5P_CRT_ORDER_INDEXED </td> + * <td>Attribute creation order is indexed (requires + * #H5P_CRT_ORDER_TRACKED).</td> + * </tr> + * </table> + * + * Default behavior is that attribute creation order is neither + * tracked nor indexed. + * + * H5Pset_attr_creation_order() can be used to set attribute + * creation order tracking, or to set attribute creation order + * tracking and indexing. + * + * \note If a creation order index is to be built, it must be specified in + * the object creation property list. HDF5 currently provides no + * mechanism to turn on attribute creation order tracking at object + * creation time and to build the index later. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pset_attr_creation_order(hid_t plist_id, unsigned crt_order_flags); +/** + * \ingroup OCPL + * + * \brief Sets attribute storage phase change thresholds + * + * \plist_id + * \param[in] max_compact Maximum number of attributes to be stored in + * compact storage (\em Default: 8); must be greater + * than or equal to \p min_dense + * + * \param[in] min_dense Minimum number of attributes to be stored in + * dense storage (\em Default: 6) + * + * \return \herr_t + * + * \details H5Pset_attr_phase_change() sets threshold values for attribute + * storage on an object. These thresholds determine the point at + * which attribute storage changes from compact storage (i.e., + * storage in the object header) to dense storage (i.e., storage + * in a heap and indexed with a B-tree). + * + * In the general case, attributes are initially kept in compact + * storage. When the number of attributes exceeds \p max_compact, + * attribute storage switches to dense storage. If the number of + * attributes subsequently falls below \p min_dense, the attributes + * are returned to compact storage. + * + * If \p max_compact is set to 0 (zero), dense storage is always + * used. \p min_dense must be set to 0 (zero) when \p max_compact + * is 0 (zero). + * + * \p plist_id is a dataset or group creation property list + * identifier. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pset_attr_phase_change(hid_t plist_id, unsigned max_compact, unsigned min_dense); +/** + * \ingroup OCPL + * + * \brief Sets deflate (GNU gzip) compression method and compression level + * + * \plist_id + * \param[in] level Compression level + * + * \return \herr_t + * + * \details H5Pset_deflate() sets the deflate compression method and the + * compression level, \p level, for a dataset or group creation + * property list, \p plist_id. + * + * The filter identifier set in the property list is + * #H5Z_FILTER_DEFLATE. + * + * The compression level, \p level, is a value from zero to nine, + * inclusive. A compression level of 0 (zero) indicates no + * compression; compression improves but speed slows progressively + * from levels 1 through 9: + * + * <table> + * <tr> + * <th>Compression Level</th> + * <th>Gzip Action</th> + * </tr> + * <tr> + * <td>0</td> + * <td>No compression</td> + * </tr> + * <tr> + * <td>1</td> + * <td>Best compression speed; least compression</td> + * </tr> + * <tr> + * <td>2 through 8</td> + * <td>Compression improves; speed degrades</td> + * </tr> + * <tr> + * <td>9</td> + * <td>Best compression ratio; slowest speed</td> + * </tr> + * </table> + * + * Note that setting the compression level to 0 (zero) does not turn + * off use of the gzip filter; it simply sets the filter to perform + * no compression as it processes the data. + * + * HDF5 relies on GNU gzip for this compression. + * + * \version 1.8.5 Function extended to work with group creation property lists. + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Pset_deflate(hid_t plist_id, unsigned level); +/** + * \ingroup OCPL + * + * \brief Adds a filter to the filter pipeline + * + * \param[in] plist_id Dataset or group creation property list identifier + * \param[in] filter Filter identifier for the filter to be added to the + * pipeline + * \param[in] flags Bit vector specifying certain general properties of + * the filter + * \param[in] cd_nelmts Number of elements in \p c_values + * \param[in] c_values Auxiliary data for the filter + * + * \return \herr_t + * + * \details H5Pset_filter() adds the specified \p filter identifier and + * corresponding properties to the end of an output filter + * pipeline. + * + * \p plist_id must be either a dataset creation property list or + * group creation property list identifier. If \p plist_id is a + * dataset creation property list identifier, the filter is added + * to the raw data filter pipeline. + * + * If \p plist_id is a group creation property list identifier, + * the filter is added to the link filter pipeline, which filters + * the fractal heap used to store most of the link metadata in + * certain types of groups. The only predefined filters that can + * be set in a group creation property list are the gzip filter + * (#H5Z_FILTER_DEFLATE) and the Fletcher32 error detection filter + * (#H5Z_FILTER_FLETCHER32). + * + * The array \p c_values contains \p cd_nelmts integers which are + * auxiliary data for the filter. The integer values will be + * stored in the dataset object header as part of the filter + * information. + * + * The \p flags argument is a bit vector with the following + * fields specifying certain general properties of the filter: + * + * <table> + * <tr> + * <td>#H5Z_FLAG_OPTIONAL</td> + * <td>If this bit is set then the filter is optional. If the + * filter fails (see below) during an H5Dwrite() operation + * then the filter is just excluded from the pipeline for + * the chunk for which it failed; the filter will not + * participate in the pipeline during an H5Dread() of the + * chunk. This is commonly used for compression filters: + * if the filter result would be larger than the input, + * then the compression filter returns failure and the + * uncompressed data is stored in the file.<br /><br /> + * This flag should not be set for the Fletcher32 checksum + * filter as it will bypass the checksum filter without + * reporting checksum errors to an application.</td> + * </tr> + * <tr> + * <td>#H5Z_FLAG_MANDATORY</td> + * <td>If the filter is required, that is, set to mandatory, + * and the filter fails, the library’s behavior depends + * on whether the chunk cache is in use: + * \li If the chunk cache is enabled, data chunks will + * be flushed to the file during H5Dclose() and the + * library will return the failure in H5Dclose(). + * \li When the chunk cache is disabled or not big enough, + * or the chunk is being evicted from the cache, the + * failure will happen during H5Dwrite(). + * + * In each case, the library will still write to the file + * all data chunks that were processed by the filter + * before the failure occurred.<br /><br /> + * For example, assume that an application creates a + * dataset of four chunks, the chunk cache is enabled and + * is big enough to hold all four chunks, and the filter + * fails when it tries to write the fourth chunk. The + * actual flush of the chunks will happen during + * H5Dclose(), not H5Dwrite(). By the time H5Dclose() + * fails, the first three chunks will have been written + * to the file. Even though H5Dclose() fails, all the + * resources will be released and the file can be closed + * properly. <br /><br /> + * If, however, the filter fails on the second chunk, only + * the first chunk will be written to the file as nothing + * further can be written once the filter fails.</td> + * </tr> + * </table> + * The \p filter parameter specifies the filter to be set. Valid + * pre-defined filter identifiers are as follows: + * + * <table> + * <tr> + * <td>#H5Z_FILTER_DEFLATE</td> + * <td>Data compression filter, employing the gzip + * algorithm</td> + * </tr> + * <tr> + * <td>#H5Z_FILTER_SHUFFLE</td> + * <td>Data shuffling filter</td> + * </tr> + * <tr> + * <td>#H5Z_FILTER_FLETCHER32</td> + * <td>Error detection filter, employing the Fletcher32 + * checksum algorithm</td> + * </tr> + * <tr> + * <td>#H5Z_FILTER_SZIP</td> + * <td>Data compression filter, employing the SZIP + * algorithm</td> + * </tr> + * <tr> + * <td>#H5Z_FILTER_NBIT</td> + * <td>Data compression filter, employing the N-Bit + * algorithm</td> + * </tr> + * <tr> + * <td>#H5Z_FILTER_SCALEOFFSET</td> + * <td>Data compression filter, employing the scale-offset + * algorithm</td> + * </tr> + * </table> + * Also see H5Pset_edc_check() and H5Pset_filter_callback(). + * + * \note When a non-empty filter pipeline is used with a group creation + * property list, the group will be created with the new group file + * format. The filters will come into play only when dense storage + * is used (see H5Pset_link_phase_change()) and will be applied to + * the group’s fractal heap. The fractal heap will contain most of + * the the group’s link metadata, including link names. + * + * \note When working with group creation property lists, if you are + * adding a filter that is not in HDF5’s set of predefined filters, + * i.e., a user-defined or third-party filter, you must first + * determine that the filter will work for a group. See the + * discussion of the set local and can apply callback functions + * in H5Zregister(). + * + * \note If multiple filters are set for a property list, they will be + * applied to each chunk of raw data for datasets or each block + * of the fractal heap for groups in the order in which they were + * set. + * + * \note Filters can be applied only to chunked datasets; they cannot be + * used with other dataset storage methods, such as contiguous, + * compact, or external datasets. + * + * \note Dataset elements of variable-length and dataset region + * reference datatypes are stored in separate structures in the + * file called heaps. Filters cannot currently be applied to + * these heaps. + * + * \note <b>Filter Behavior in HDF5:</b><br /> + * Filters can be inserted into the HDF5 pipeline to perform + * functions such as compression and conversion. As such, they are + * a very flexible aspect of HDF5; for example, a user-defined + * filter could provide encryption for an HDF5 dataset. + * + * \note A filter can be declared as either required or optional. + * Required is the default status; optional status must be + * explicitly declared. + * + * \note A required filter that fails or is not defined causes an + * entire output operation to fail; if it was applied when the + * data was written, such a filter will cause an input operation + * to fail. + * + * \note The following table summarizes required filter behavior. + * <table> + * <tr> + * <th></th> + * <th>Required FILTER_X not available</th> + * <th>FILTER_X available</th> + * </tr> + * <tr> + * <td>H5Pset_<FILTER_X></td> + * <td>Will fail.</td> + * <td>Will succeed.</td> + * </tr> + * <tr> + * <td>H5Dwrite with FILTER_X set</td> + * <td>Will fail.</td> + * <td>Will succeed; FILTER_X will be applied to + * the data.</td> + * </tr> + * <tr> + * <td>H5Dread with FILTER_X set</td> + * <td>Will fail.</td> + * <td>Will succeed.</td> + * </tr> + * </table> + * \note An optional filter can be set for an HDF5 dataset even when + * the filter is not available. Such a filter can then be + * applied to the dataset when it becomes available on the + * original system or when the file containing the dataset is + * processed on a system on which it is available. + * + * \note A filter can be declared as optional through the use of the + * #H5Z_FLAG_OPTIONAL flag with H5Pset_filter(). + * + * \note Consider a situation where one is creating files that will + * normally be used only on systems where the optional (and + * fictional) filter FILTER_Z is routinely available. One can + * create those files on system A, which lacks FILTER_Z, create + * chunked datasets in the files with FILTER_Z defined in the + * dataset creation property list, and even write data to those + * datasets. The dataset object header will indicate that FILTER_Z + * has been associated with this dataset. But since system A does + * not have FILTER_Z, dataset chunks will be written without it + * being applied. + * + * \note HDF5 has a mechanism for determining whether chunks are + * actually written with the filters specified in the object + * header, so while the filter remains unavailable, system A will + * be able to read the data. Once the file is moved to system B, + * where FILTER_Z is available, HDF5 will apply FILTER_Z to any + * data rewritten or new data written in these datasets. Dataset + * chunks that have been written on system B will then be + * unreadable on system A; chunks that have not been re-written + * since being written on system A will remain readable on system + * A. All chunks will be readable on system B. + * + * \note The following table summarizes optional filter behavior. + * <table> + * <tr> + * <th></th> + * <th>FILTER_Z not available</th> + * <th>FILTER_Z available<br /> with encode and decode</th> + * <th>FILTER_Z available decode only</th> + * </tr> + * <tr> + * <td>H5Pset_<FILTER_Z></td> + * <td>Will succeed.</td> + * <td>Will succeed.</td> + * <td>Will succeed.</td> + * </tr> + * <tr> + * <td>H5Dread with FILTER_Z set</td> + * <td>Will succeed if FILTER_Z has not actually<br /> + * been applied to data.</td> + * <td>Will succeed.</td> + * <td>Will succeed.</td> + * </tr> + * <tr> + * <td>H5Dwrite with FILTER_Z set</td> + * <td>Will succeed;<br /> + * FILTER_Z will not be applied to the data.</td> + * <td>Will succeed;<br /> + * FILTER_Z will be applied to the data.</td> + * <td>Will succeed;<br /> + * FILTER_Z will not be applied to the data.</td> + * </tr> + * </table> + * \note The above principles apply generally in the use of HDF5 + * optional filters insofar as HDF5 does as much as possible to + * complete an operation when an optional filter is unavailable. + * (The SZIP filter is an exception to this rule; see H5Pset_szip() + * for details.) + * + * \todo Removed several references to links to documentation + * + * \version 1.8.5 Function applied to group creation property lists. + * \since 1.6.0 + * + */ +H5_DLL herr_t H5Pset_filter(hid_t plist_id, H5Z_filter_t filter, + unsigned int flags, size_t cd_nelmts, + const unsigned int c_values[]); +/** + * \ingroup OCPL + * + * \brief Sets up use of the Fletcher32 checksum filter + * + * \param[in] plist_id Dataset or group creation property list identifier + * + * \return \herr_t + * + * \details H5Pset_fletcher32() sets the Fletcher32 checksum filter in the + * dataset or group creation property list \p plist_id. + * + * \attention The Fletcher32 EDC checksum filter was added in HDF5 Release + * 1.6.0. In the original implementation, however, the checksum + * value was calculated incorrectly on little-endian systems. + * The error was fixed in HDF5 Release 1.6.3. + * + * \attention As a result of this fix, an HDF5 library of Release 1.6.0 + * through Release 1.6.2 cannot read a dataset created or written + * with Release 1.6.3 or later if the dataset was created with + * the checksum filter and the filter is enabled in the reading + * library. (Libraries of Release 1.6.3 and later understand the + * earlier error and compensate appropriately.) + * + * \attention \b Work-around: An HDF5 library of Release 1.6.2 or earlier + * will be able to read a dataset created or written with the + * checksum filter by an HDF5 library of Release 1.6.3 or later + * if the checksum filter is disabled for the read operation. + * This can be accomplished via a call to H5Pset_edc_check() + * with the value #H5Z_DISABLE_EDC in the second parameter. + * This has the obvious drawback that the application will be + * unable to verify the checksum, but the data does remain + * accessible. + * + * \version 1.8.5 Function extended to work with group creation property + * lists. + * \version 1.6.3 Error in checksum calculation on little-endian systems + * corrected in this release. + * \since 1.6.0 + * + */ H5_DLL herr_t H5Pset_fletcher32(hid_t plist_id); +/** + * \ingroup OCPL + * + * \brief Sets the recording of times associated with an object + * + * \param[in] plist_id Object creation property list identifier + * \param[in] track_times Boolean value, 1 or 0, specifying whether object + * times are to be tracked + * + * \return \herr_t + * + * \details H5Pset_obj_track_times() sets a property in the object creation + * property list, \p plist_id, that governs the recording of times + * associated with an object. + * + * If \p track_times is set to 1, time data will be recorded. If + * \p track_times is set to 0, time data will not be recorded. + * + * Time data can be retrieved with H5Oget_info(), which will + * return it in the #H5O_info_t struct. + * + * If times are not tracked, they will be reported as follows when queried: + * \Code{ 12:00 AM UDT, Jan. 1, 1970} + * + * That date and time are commonly used to represent the beginning of the UNIX epoch. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pset_obj_track_times(hid_t plist_id, hbool_t track_times); /* File creation property list (FCPL) routines */ -H5_DLL herr_t H5Pset_userblock(hid_t plist_id, hsize_t size); +/** + * \ingroup FCPL + * + * \brief Retrieves the file space page size for a file creation property + * list + * + * \fcpl_id{plist_id} + * \param[out] fsp_size File space page size + * + * \return \herr_t + * + * \details H5Pget_file_space_page_size() retrieves the file space page + * size for paged aggregation in the parameter \p fsp_size. + * + * The library default is 4KB (4096) if \p fsp_size is not + * previously set via a call to H5Pset_file_space_page_size(). + * + * \since 1.10.1 + * + */ +H5_DLL herr_t H5Pget_file_space_page_size(hid_t plist_id, hsize_t *fsp_size); +/** + * \ingroup FCPL + * + * \brief Retrieves the file space handling strategy, persisting free-space + * condition and threshold value for a file creation property list + * + * \fcpl_id{plist_id} + * \param[out] strategy The file space handling strategy + * \param[out] persist The boolean value indicating whether free space is + * persistent or not + * \param[out] threshold The free-space section size threshold value + * + * \return \herr_t + * + * \details H5Pget_file_space_strategy() retrieves the file space handling + * strategy, the persisting free-space condition and the threshold + * value in the parameters \p strategy, \p persist and + * \p threshold respectively. + * + * The library default values returned when + * H5Pset_file_space_strategy() has not been called are: + * + * \li \p strategy - #H5F_FSPACE_STRATEGY_FSM_AGGR + * \li \p persist - 0 + * \li \p threshold - 1 + * + * \since 1.10.1 + * + */ +H5_DLL herr_t H5Pget_file_space_strategy(hid_t plist_id, H5F_fspace_strategy_t *strategy, hbool_t *persist, hsize_t *threshold); +/** + * \ingroup FCPL + * + * \brief Queries the 1/2 rank of an indexed storage B-tree + * + * \fcpl_id{plist_id} + * \param[out] ik Pointer to location to return the chunked storage B-tree + * 1/2 rank (<em>Default value of B-tree 1/2 rank: 32</em>) + * + * \return \herr_t + * + * \details H5Pget_istore_k() queries the 1/2 rank of an indexed storage + * B-tree. + * + * The argument \p ik may be the null pointer (NULL). + * This function is valid only for file creation property lists. + * + * \see H5Pset_istore_k() + * + * \version 1.6.4 \p ik parameter type changed to \em unsigned. + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Pget_istore_k(hid_t plist_id, unsigned *ik/*out*/); +/** + * \ingroup FCPL + * + * \brief Retrieves the configuration settings for a shared message index + * + * \fcpl_id{plist_id} + * \param[in] index_num Index being configured + * \param[out] mesg_type_flags Types of messages that may be stored in + * this index + * \param[out] min_mesg_size Minimum message size + * + * \return \herr_t + * + * \details H5Pget_shared_mesg_index() retrieves the message type and + * minimum message size settings from the file creation property + * list \p plist_id for the shared object header message index + * specified by \p index_num. + * + * \p index_num specifies the index. \p index_num is zero-indexed, + * so in a file with three indexes, they will be numbered 0, 1, + * and 2. + * + * \p mesg_type_flags and \p min_mesg_size will contain, + * respectively, the types of messages and the minimum size, in + * bytes, of messages that can be stored in this index. + * + * Valid message types are described in H5Pset_shared_mesg_index(). + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pget_shared_mesg_index(hid_t plist_id, unsigned index_num, unsigned *mesg_type_flags, unsigned *min_mesg_size); +/** + * \ingroup FCPL + * + * \brief Retrieves number of shared object header message indexes in file + * creation property list + * + * \fcpl_id{plist_id} + * \param[out] nindexes Number of shared object header message indexes + * available in files created with this property list + * + * \return \herr_t + * + * \details H5Pget_shared_mesg_nindexes() retrieves the number of shared + * object header message indexes in the specified file creation + * property list \p plist_id. + * + * If the value of \p nindexes is 0 (zero), shared object header + * messages are disabled in files created with this property list. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pget_shared_mesg_nindexes(hid_t plist_id, unsigned *nindexes); +/** + * \ingroup FCPL + * + * \brief Retrieves shared object header message phase change information + * + * \fcpl_id{plist_id} + * \param[out] max_list Threshold above which storage of a shared object + * header message index shifts from list to B-tree + * \param[out] min_btree Threshold below which storage of a shared object + * header message index reverts to list format + * + * \return \herr_t + * + * \details H5Pget_shared_mesg_phase_change() retrieves the threshold values + * for storage of shared object header message indexes in a file. + * These phase change thresholds determine the point at which the + * index storage mechanism changes from a more compact list format + * to a more performance-oriented B-tree format, and vice-versa. + * + * By default, a shared object header message index is initially + * stored as a compact list. When the number of messages in an + * index exceeds the specified \p max_list threshold, storage + * switches to a B-tree format for improved performance. If the + * number of messages subsequently falls below the \p min_btree + * threshold, the index will revert to the list format. + * + * If \p max_list is set to 0 (zero), shared object header message + * indexes in the file will always be stored as B-trees. + * + * \p plist_id specifies the file creation property list. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pget_shared_mesg_phase_change(hid_t plist_id, unsigned *max_list, unsigned *min_btree); +/** + * \ingroup FCPL + * + * \brief Retrieves the size of the offsets and lengths used in an HDF5 + * file + * + * \fcpl_id{plist_id} + * \param[out] sizeof_addr Pointer to location to return offset size in + * bytes + * \param[out] sizeof_size Pointer to location to return length size in + * bytes + * + * \return \herr_t + * + * \details H5Pget_sizes() retrieves the size of the offsets and lengths + * used in an HDF5 file. This function is only valid for file + * creation property lists. + * + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Pget_sizes(hid_t plist_id, size_t *sizeof_addr/*out*/, + size_t *sizeof_size/*out*/); +/** + * \ingroup FCPL + * + * \brief Retrieves the size of the symbol table B-tree 1/2 rank and the + * symbol table leaf node 1/2 size + * + * \fcpl_id{plist_id} + * \param[out] ik Pointer to location to return the symbol table's B-tree + * 1/2 rank (<em>Default value of B-tree 1/2 rank: 16</em>) + * \param[out] lk Pointer to location to return the symbol table's leaf + * node 1/2 size (<em>Default value of leaf node 1/2 + * size: 4</em>) + * + * \return \herr_t + * + * \details H5Pget_sym_k() retrieves the size of the symbol table B-tree + * 1/2 rank and the symbol table leaf node 1/2 size. + * + * This function is valid only for file creation property lists. + * + * If a parameter value is set to NULL, that parameter is not + * retrieved. + * + * \see H5Pset_sym_k() + * + * \version 1.6.4 \p ik parameter type changed to \em unsigned + * \version 1.6.0 The \p ik parameter has changed from type int to + * \em unsigned + * + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Pget_sym_k(hid_t plist_id, unsigned *ik/*out*/, unsigned *lk/*out*/); +/** + * \ingroup FCPL + * + * \brief Retrieves the size of a user block + * + * \fcpl_id{plist_id} + * \param[out] size Pointer to location to return user-block size + * + * \return \herr_t + * + * \details H5Pget_userblock() retrieves the size of a user block in a + * file creation property list. + * + * \since 1.0.0 + * + */ H5_DLL herr_t H5Pget_userblock(hid_t plist_id, hsize_t *size); -H5_DLL herr_t H5Pset_sizes(hid_t plist_id, size_t sizeof_addr, size_t sizeof_size); -H5_DLL herr_t H5Pget_sizes(hid_t plist_id, size_t *sizeof_addr /*out*/, size_t *sizeof_size /*out*/); -H5_DLL herr_t H5Pset_sym_k(hid_t plist_id, unsigned ik, unsigned lk); -H5_DLL herr_t H5Pget_sym_k(hid_t plist_id, unsigned *ik /*out*/, unsigned *lk /*out*/); +/** + * \ingroup FCPL + * + * \brief Sets the file space page size for a file creation property list + * + * \fcpl_id{plist_id} + * \param[in] fsp_size File space page size + * + * \return \herr_t + * + * \details H5Pset_file_space_page_size() sets the file space page size + * \p fsp_size used in paged aggregation and paged buffering. + * + * \p fsp_size has a minimum size of 512. Setting a value less + * than 512 will return an error. The library default size for + * the file space page size when not set is 4096. + * + * The size set via this routine may not be changed for the life + * of the file. + * + * \since 1.10.1 + * + */ +H5_DLL herr_t H5Pset_file_space_page_size(hid_t plist_id, hsize_t fsp_size); +/** + * \ingroup FCPL + * + * \brief Sets the file space handling strategy and persisting free-space + * values for a file creation property list + * + * \fcpl_id{plist_id} + * \param[in] strategy The file space handling strategy to be used. See: + * #H5F_fspace_strategy_t + * \param[in] persist A boolean value to indicate whether free space + * should be persistent or not + * \param[in] threshold The smallest free-space section size that the free + * space manager will track + * + * \return \herr_t + * + * \details H5Pset_file_space_strategy() sets the file space handling + * \p strategy, specifies persisting free-space or not (\p persist), + * and sets the free-space section size \p threshold in the file + * creation property list \p plist_id. + * + * #H5F_fspace_strategy_t is a struct defined in H5Fpublic.h as + * follows: + * + * \snippet H5Fpublic.h H5F_fspace_strategy_t_snip + * + * This setting cannot be changed for the life of the file. + * + * As the #H5F_FSPACE_STRATEGY_AGGR and #H5F_FSPACE_STRATEGY_NONE + * strategies do not use the free-space managers, the \p persist + * and \p threshold settings will be ignored for those strategies. + * + * \since 1.10.1 + * + */ +H5_DLL herr_t H5Pset_file_space_strategy(hid_t plist_id, H5F_fspace_strategy_t strategy, hbool_t persist, hsize_t threshold); +/** + * \ingroup FCPL + * + * \brief Sets the size of the parameter used to control the B-trees for + * indexing chunked datasets + * + * \fcpl_id{plist_id} + * \param[in] ik 1/2 rank of chunked storage B-tree + * + * \return \herr_t + * + * \details H5Pset_istore_k() sets the size of the parameter used to + * control the B-trees for indexing chunked datasets. This + * function is valid only for file creation property lists. + * + * \p ik is one half the rank of a tree that stores chunked + * raw data. On average, such a tree will be 75% full, or have + * an average rank of 1.5 times the value of \p ik. + * + * The HDF5 library uses (\p ik*2) as the maximum # of entries + * before splitting a B-tree node. Since only 2 bytes are used + * in storing # of entries for a B-tree node in an HDF5 file, + * (\p ik*2) cannot exceed 65536. The default value for + * \p ik is 32. + * + * \version 1.6.4 \p ik parameter type changed to \p unsigned. + * \since 1.0.0 + * + */ H5_DLL herr_t H5Pset_istore_k(hid_t plist_id, unsigned ik); -H5_DLL herr_t H5Pget_istore_k(hid_t plist_id, unsigned *ik /*out*/); +/** + * \ingroup FCPL + * + * \brief Configures the specified shared object header message index + * + * \fcpl_id{plist_id} + * \param[in] index_num Index being configured + * \param[in] mesg_type_flags Types of messages that should be stored in + * this index + * \param[in] min_mesg_size Minimum message size + * + * \return \herr_t + * + * \details H5Pset_shared_mesg_index() is used to configure the specified + * shared object header message index, setting the types of + * messages that may be stored in the index and the minimum size + * of each message. + * + * \p plist_id specifies the file creation property list. + * + * \p index_num specifies the index to be configured. + * \p index_num is zero-indexed, so in a file with three indexes, + * they will be numbered 0, 1, and 2. + * + * \p mesg_type_flags and \p min_mesg_size specify, respectively, + * the types and minimum size of messages that can be stored in + * this index. + * + * Valid message types are as follows: + * + * <table> + * <tr> + * <td>#H5O_SHMESG_NONE_FLAG</td> + * <td>No shared messages</td> + * </tr> + * <tr> + * <td>#H5O_SHMESG_SDSPACE_FLAG</td> + * <td>Simple dataspace message</td> + * </tr> + * <tr> + * <td>#H5O_SHMESG_DTYPE_FLAG</td> + * <td>Datatype message</td> + * </tr> + * <tr> + * <td>#H5O_SHMESG_FILL_FLAG</td> + * <td>Fill value message</td> + * </tr> + * <tr> + * <td>#H5O_SHMESG_PLINE_FLAG</td> + * <td>Filter pipeline message</td> + * </tr> + * <tr> + * <td>#H5O_SHMESG_ATTR_FLAG</td> + * <td>Attribute message</td> + * </tr> + * <tr> + * <td>#H5O_SHMESG_ALL_FLAG</td> + * <td>All message types; i.e., equivalent to the following: + * (#H5O_SHMESG_SDSPACE_FLAG | #H5O_SHMESG_DTYPE_FLAG | + * #H5O_SHMESG_FILL_FLAG | #H5O_SHMESG_PLINE_FLAG | + * #H5O_SHMESG_ATTR_FLAG)</td> + * </tr> + * </table> + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pset_shared_mesg_index(hid_t plist_id, unsigned index_num, unsigned mesg_type_flags, unsigned min_mesg_size); +/** + * \ingroup FCPL + * + * \brief Sets number of shared object header message indexes + * + * \fcpl_id{plist_id} + * \param[in] nindexes Number of shared object header message indexes to be + * available in files created with this property list + * (\p nindexes must be <= #H5O_SHMESG_MAX_NINDEXES (8)) + * + * \return \herr_t + * + * \details H5Pset_shared_mesg_nindexes() sets the number of shared object + * header message indexes in the specified file creation property + * list. + * + * This setting determines the number of shared object header + * message indexes, \p nindexes, that will be available in files + * created with this property list. These indexes can then be + * configured with H5Pset_shared_mesg_index(). + * + * If \p nindexes is set to 0 (zero), shared object header messages + * are disabled in files created with this property list. + * + * There is a limit of #H5O_SHMESG_MAX_NINDEXES (8) that can be set + * with H5Pset_shared_mesg_nindexes(). An error will occur if + * specifying a value of \p nindexes that is greater than this value. + * + * \since 1.8.0 + * + */ H5_DLL herr_t H5Pset_shared_mesg_nindexes(hid_t plist_id, unsigned nindexes); -H5_DLL herr_t H5Pget_shared_mesg_nindexes(hid_t plist_id, unsigned *nindexes); -H5_DLL herr_t H5Pset_shared_mesg_index(hid_t plist_id, unsigned index_num, unsigned mesg_type_flags, - unsigned min_mesg_size); -H5_DLL herr_t H5Pget_shared_mesg_index(hid_t plist_id, unsigned index_num, unsigned *mesg_type_flags, - unsigned *min_mesg_size); +/** + * \ingroup FCPL + * + * \brief Sets shared object header message storage phase change thresholds + * + * \fcpl_id{plist_id} + * \param[in] max_list Threshold above which storage of a shared object + * header message index shifts from list to B-tree + * \param[in] min_btree Threshold below which storage of a shared object + * header message index reverts to list format + * + * \return \herr_t + * + * \details H5Pset_shared_mesg_phase_change() sets threshold values for + * storage of shared object header message indexes in a file. + * These phase change thresholds determine the point at which the + * index storage mechanism changes from a more compact list format + * to a more performance-oriented B-tree format, and vice-versa. + * + * By default, a shared object header message index is initially + * stored as a compact list. When the number of messages in an + * index exceeds the threshold value of \p max_list, storage + * switches to a B-tree for improved performance. If the number + * of messages subsequently falls below the \p min_btree threshold, + * the index will revert to the list format. + * + * If \p max_list is set to 0 (zero), shared object header message + * indexes in the file will be created as B-trees and will never + * revert to lists. + * + * \p plist_id specifies the file creation property list. + * + * \since 1.8.0 + * + */ H5_DLL herr_t H5Pset_shared_mesg_phase_change(hid_t plist_id, unsigned max_list, unsigned min_btree); -H5_DLL herr_t H5Pget_shared_mesg_phase_change(hid_t plist_id, unsigned *max_list, unsigned *min_btree); -H5_DLL herr_t H5Pset_file_space_strategy(hid_t plist_id, H5F_fspace_strategy_t strategy, hbool_t persist, - hsize_t threshold); -H5_DLL herr_t H5Pget_file_space_strategy(hid_t plist_id, H5F_fspace_strategy_t *strategy, hbool_t *persist, - hsize_t *threshold); -H5_DLL herr_t H5Pset_file_space_page_size(hid_t plist_id, hsize_t fsp_size); -H5_DLL herr_t H5Pget_file_space_page_size(hid_t plist_id, hsize_t *fsp_size); +/** + * \ingroup FCPL + * + * \brief Sets the byte size of the offsets and lengths used to address + * objects in an HDF5 file + * + * \fcpl_id{plist_id} + * \param[in] sizeof_addr Size of an object offset in bytes + * \param[in] sizeof_size Size of an object length in bytes + * + * \return \herr_t + * + * \details H5Pset_sizes() sets the byte size of the offsets and lengths + * used to address objects in an HDF5 file. This function is only + * valid for file creation property lists. Passing in a value + * of 0 for one of the parameters retains the current value. The + * default value for both values is the same as sizeof(hsize_t) + * in the library (normally 8 bytes). Valid values currently + * are 2, 4, 8 and 16. + * + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Pset_sizes(hid_t plist_id, size_t sizeof_addr, + size_t sizeof_size); +/** + * \ingroup FCPL + * + * \brief + * + * \fcpl_id{plist_id} + * \param[in] ik Symbol table tree rank + * \param[in] lk Symbol table node size + * + * \return \herr_t + * + * \details H5Pset_sym_k() sets the size of parameters used to control the + * symbol table nodes. + * + * This function is valid only for file creation property lists. + * Passing in a value of zero (0) for one of the parameters retains + * the current value. + * + * \p ik is one half the rank of a B-tree that stores a symbol + * table for a group. Internal nodes of the symbol table are on + * average 75% full. That is, the average rank of the tree is + * 1.5 times the value of \p ik. The HDF5 library uses (\p ik*2) as + * the maximum # of entries before splitting a B-tree node. Since + * only 2 bytes are used in storing # of entries for a B-tree node + * in an HDF5 file, (\p ik*2) cannot exceed 65536. The default value + * for \p ik is 16. + * + * \p lk is one half of the number of symbols that can be stored in + * a symbol table node. A symbol table node is the leaf of a symbol + * table tree which is used to store a group. When symbols are + * inserted randomly into a group, the group's symbol table nodes are + * 75% full on average. That is, they contain 1.5 times the number of + * symbols specified by \p lk. The default value for \p lk is 4. + * + * \version 1.6.4 \p ik parameter type changed to \em unsigned. + * \version 1.6.0 The \p ik parameter has changed from type int to + * \em unsigned. + * + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Pset_sym_k(hid_t plist_id, unsigned ik, unsigned lk); +/** + * \ingroup FCPL + * + * \brief Sets user block size + * + * \fcpl_id{plist_id} + * \param[in] size Size of the user-block in bytes + * + * \return \herr_t + * + * \details H5Pset_userblock() sets the user block size of a file creation + * property list. The default user block size is 0; it may be set + * to any power of 2 equal to 512 or greater (512, 1024, 2048, etc.). + * + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Pset_userblock(hid_t plist_id, hsize_t size); /* File access property list (FAPL) routines */ -H5_DLL herr_t H5Pset_alignment(hid_t fapl_id, hsize_t threshold, hsize_t alignment); -H5_DLL herr_t H5Pget_alignment(hid_t fapl_id, hsize_t *threshold /*out*/, hsize_t *alignment /*out*/); -H5_DLL herr_t H5Pset_driver(hid_t plist_id, hid_t driver_id, const void *driver_info); -H5_DLL hid_t H5Pget_driver(hid_t plist_id); +/** + * \ingroup FAPL + * + * \brief Retrieves the current settings for alignment properties from a + * file access property list + * + * \fapl_id + * \param[out] threshold Pointer to location of return threshold value + * \param[out] alignment Pointer to location of return alignment value + * + * \return \herr_t + * + * \details H5Pget_alignment() retrieves the current settings for + * alignment properties from a file access property list. The + * \p threshold and/or \p alignment pointers may be null + * pointers (NULL). + * + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Pget_alignment(hid_t fapl_id, hsize_t *threshold/*out*/, + hsize_t *alignment/*out*/); +/** + * \ingroup FAPL + * + * \brief Queries the raw data chunk cache parameters + * + * \fapl_id{plist_id} + * \param[in,out] mdc_nelmts <i>No longer used</i> + * \param[in,out] rdcc_nslots Number of elements (objects) in the raw data + * chunk cache + * \param[in,out] rdcc_nbytes Total size of the raw data chunk cache, in + * bytes + * \param[in,out] rdcc_w0 Preemption policy + * + * \return \herr_t + * + * \details H5Pget_cache() retrieves the maximum possible number of + * elements in the raw data chunk cache, the maximum possible + * number of bytes in the raw data chunk cache, and the + * preemption policy value. + * + * Any (or all) arguments may be null pointers, in which case + * the corresponding datum is not returned. + * + * Note that the \p mdc_nelmts parameter is no longer used. + * + * \version 1.8.0 Use of the \p mdc_nelmts parameter discontinued. + * Metadata cache configuration is managed with + * H5Pset_mdc_config() and H5Pget_mdc_config() + * \version 1.6.0 The \p rdcc_nbytes and \p rdcc_nslots parameters changed + * from type int to size_t. + * + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Pget_cache(hid_t plist_id, + int *mdc_nelmts, /* out */ + size_t *rdcc_nslots/*out*/, + size_t *rdcc_nbytes/*out*/, double *rdcc_w0); +/** + * \ingroup FAPL + * + * \brief Gets information about the write tracking feature used by + * the core VFD + * + * \fapl_id + * \param[out] is_enabled Whether the feature is enabled + * \param[out] page_size Size, in bytes, of write aggregation pages + * + * \return \herr_t + * + * \details H5Pget_core_write_tracking() retrieves information about the + * write tracking feature used by the core VFD. + * + * When a file is created or opened for writing using the core + * virtual file driver (VFD) with the backing store option turned + * on, the VFD can be configured to track changes to the file + * and only write out the modified bytes. To avoid a large number + * of small writes, the changes can be aggregated into pages of + * a user-specified size. The core VFD is also known as the + * memory VFD. The driver identifier is #H5FD_CORE. + * + * \note This function is only for use with the core VFD and must be used + * after the call to H5Pset_fapl_core(). It is an error to use this + * function with any other VFD. + * + * \note This function only applies to the backing store write operation + * which typically occurs when the file is flushed or closed. This + * function has no relationship to the increment parameter passed + * to H5Pset_fapl_core(). + * + * \note For optimum performance, the \p page_size parameter should be + * a power of two. + * + * \since 1.8.13 + * + */ +H5_DLL herr_t H5Pget_core_write_tracking(hid_t fapl_id, hbool_t *is_enabled, size_t *page_size); +/** + * \ingroup FAPL + * + * \brief Returns low-lever driver identifier + * + * \plist_id + * + * \return \hid_t{low level driver} + * + * \details H5Pget_driver() returns the identifier of the low-level file + * driver associated with the file access property list or + * data transfer property list \p plist_id. + * + * Valid driver identifiers distributed with HDF5 are listed and + * described in the following table. + * + * <table> + * <tr> + * <th>Driver Name</th> + * <th>Driver Identifier</th> + * <th>Description</th> + * <th>Related Function</th> + * </tr> + * <tr> + * <td>POSIX</td> + * <td>#H5FD_SEC2</td> + * <td>This driver uses POSIX file-system functions like read and + * write to perform I/O to a single, permanent file on local disk + * with no system buffering. This driver is POSIX-compliant and is + * the default file driver for all systems.</td> + * <td>H5Pset_fapl_sec2()</td> + * </tr> + * <tr> + * <td>Direct</td> + * <td>#H5FD_DIRECT</td> + * <td>This is the #H5FD_SEC2 driver except data is written to or + * read from the file synchronously without being cached by the + * system.</td> + * <td>H5Pset_fapl_direct()</td> + * </tr> + * <tr> + * <td>Log</td> + * <td>#H5FD_LOG</td> + * <td>This is the #H5FD_SEC2 driver with logging capabilities.</td> + * <td>H5Pset_fapl_log()</td> + * </tr> + * <tr> + * <td>Windows</td> + * <td>#H5FD_WINDOWS</td> + * <td>This driver was modified in HDF5-1.8.8 to be a wrapper of the + * POSIX driver, #H5FD_SEC2. This change should not affect user + * applications.</td> + * <td>H5Pset_fapl_windows()</td> + * </tr> + * <tr> + * <td>STDIO</td> + * <td>#H5FD_STDIO</td> + * <td>This driver uses functions from the standard C stdio.h to + * perform I/O to a single, permanent file on local disk with + * additional system buffering.</td> + * <td>H5Pset_fapl_stdio()</td> + * </tr> + * <tr> + * <td>Memory</td> + * <td>#H5FD_CORE</td> + * <td>With this driver, an application can work with a file in + * memory for faster reads and writes. File contents are kept in + * memory until the file is closed. At closing, the memory version + * of the file can be written back to disk or abandoned.</td> + * <td>H5Pset_fapl_core()</td> + * </tr> + * <tr> + * <td>Family</td> + * <td>#H5FD_FAMILY</td> + * <td>With this driver, the HDF5 file’s address space is partitioned + * into pieces and sent to separate storage files using an + * underlying driver of the user’s choice. This driver is for + * systems that do not support files larger than 2 gigabytes.</td> + * <td>H5Pset_fapl_family()</td> + * </tr> + * <tr> + * <td>Multi</td> + * <td>#H5FD_MULTI</td> + * <td>With this driver, data can be stored in multiple files + * according to the type of the data. I/O might work better if + * data is stored in separate files based on the type of data. + * The Split driver is a special case of this driver.</td> + * <td>H5Pset_fapl_multi()</td> + * </tr> + * <tr> + * <td>Parallel</td> + * <td>#H5FD_MPIO</td> + * <td>This is the standard HDF5 file driver for parallel file + * systems. This driver uses the MPI standard for both + * communication and file I/O.</td> + * <td>H5Pset_fapl_mpio()</td> + * </tr> + * <tr> + * <td>Parallel POSIX</td> + * <td>H5FD_MPIPOSIX</td> + * <td>This driver is no longer available.</td> + * <td></td> + * </tr> + * <tr> + * <td>Stream</td> + * <td>H5FD_STREAM</td> + * <td>This driver is no longer available.</td> + * <td></td> + * </tr> + * </table> + * + * This list does not include custom drivers that might be + * defined and registered by a user. + * + * The returned driver identifier is only valid as long as the + * file driver remains registered. + * + * + * \since 1.4.0 + * + */ +H5_DLL hid_t H5Pget_driver(hid_t plist_id); +/** + * \ingroup FAPL + * + * \brief Returns a pointer to file driver information + * + * \param[in] plist_id File access or data transfer property list + * identifier + * + * \return Returns a pointer to a struct containing low-level driver + * information. Otherwise returns NULL. NULL is also returned if + * no driver-specific properties have been registered. No error + * is pushed on the stack in this case. + * + * \details H5Pget_driver_info() returns a pointer to file driver-specific + * information for the low-level driver associated with the file + * access or data transfer property list \p plist_id. + * + * The pointer returned by this function points to an “uncopied” + * struct. Driver-specific versions of that struct are defined + * for each low-level driver in the relevant source code file + * H5FD*.c. For example, the struct used for the MULTI driver is + * #H5FD_multi_fapl_t defined in H5FDmulti.c. + * + * If no driver-specific properties have been registered, + * H5Pget_driver_info() returns NULL. + * + * \note H5Pget_driver_info() and H5Pset_driver() are used only when + * creating a virtual file driver (VFD) in the virtual file + * layer (VFL). + * + * \version 1.10.1 Return value was changed from \em void * to + * \em const \em void *. + * \version 1.8.2 Function publicized in this release; previous releases + * described this function only in the virtual file driver + * documentation. + * + */ H5_DLL const void *H5Pget_driver_info(hid_t plist_id); -H5_DLL herr_t H5Pset_vol(hid_t plist_id, hid_t new_vol_id, const void *new_vol_info); -H5_DLL herr_t H5Pget_vol_id(hid_t plist_id, hid_t *vol_id); -H5_DLL herr_t H5Pget_vol_info(hid_t plist_id, void **vol_info); -H5_DLL herr_t H5Pset_family_offset(hid_t fapl_id, hsize_t offset); -H5_DLL herr_t H5Pget_family_offset(hid_t fapl_id, hsize_t *offset); -H5_DLL herr_t H5Pset_multi_type(hid_t fapl_id, H5FD_mem_t type); -H5_DLL herr_t H5Pget_multi_type(hid_t fapl_id, H5FD_mem_t *type); -H5_DLL herr_t H5Pset_cache(hid_t plist_id, int mdc_nelmts, size_t rdcc_nslots, size_t rdcc_nbytes, - double rdcc_w0); -H5_DLL herr_t H5Pget_cache(hid_t plist_id, int *mdc_nelmts, /* out */ - size_t *rdcc_nslots /*out*/, size_t *rdcc_nbytes /*out*/, double *rdcc_w0); -H5_DLL herr_t H5Pset_mdc_config(hid_t plist_id, H5AC_cache_config_t *config_ptr); -H5_DLL herr_t H5Pget_mdc_config(hid_t plist_id, H5AC_cache_config_t *config_ptr); /* out */ -H5_DLL herr_t H5Pset_gc_references(hid_t fapl_id, unsigned gc_ref); -H5_DLL herr_t H5Pget_gc_references(hid_t fapl_id, unsigned *gc_ref /*out*/); -H5_DLL herr_t H5Pset_fclose_degree(hid_t fapl_id, H5F_close_degree_t degree); -H5_DLL herr_t H5Pget_fclose_degree(hid_t fapl_id, H5F_close_degree_t *degree); -H5_DLL herr_t H5Pset_meta_block_size(hid_t fapl_id, hsize_t size); -H5_DLL herr_t H5Pget_meta_block_size(hid_t fapl_id, hsize_t *size /*out*/); -H5_DLL herr_t H5Pset_sieve_buf_size(hid_t fapl_id, size_t size); -H5_DLL herr_t H5Pget_sieve_buf_size(hid_t fapl_id, size_t *size /*out*/); -H5_DLL herr_t H5Pset_small_data_block_size(hid_t fapl_id, hsize_t size); -H5_DLL herr_t H5Pget_small_data_block_size(hid_t fapl_id, hsize_t *size /*out*/); -H5_DLL herr_t H5Pset_libver_bounds(hid_t plist_id, H5F_libver_t low, H5F_libver_t high); -H5_DLL herr_t H5Pget_libver_bounds(hid_t plist_id, H5F_libver_t *low, H5F_libver_t *high); +H5_DLL herr_t H5Pget_elink_file_cache_size(hid_t plist_id, unsigned *efc_size); +H5_DLL herr_t H5Pget_evict_on_close(hid_t fapl_id, hbool_t *evict_on_close); +/** + * \ingroup FAPL + * + * \brief Retrieves a data offset from the file access property list + * + * \fapl_id + * \param[out] offset Offset in bytes within the HDF5 file + * + * \return \herr_t + * + * \details H5Pget_family_offset() retrieves the value of offset from the + * file access property list \p fapl_id so that the user + * application can retrieve a file handle for low-level access to + * a particular member of a family of files. The file handle is + * retrieved with a separate call to H5Fget_vfd_handle() (or, + * in special circumstances, to H5FDget_vfd_handle()). + * + * \todo References the VFL documentation. + * + * \since 1.6.0 + * + */ +H5_DLL herr_t H5Pget_family_offset(hid_t fapl_id, hsize_t *offset); +/** + * \ingroup FAPL + * + * \brief Returns the file close degree + * + * \fapl_id + * \param[out] degree Pointer to a location to which to return the file + * close degree property, the value of \p degree + * + * \return \herr_t + * + * \details H5Pget_fclose_degree() returns the current setting of the file + * close degree property \p degree in the file access property + * list \p fapl_id. The value of \p degree determines how + * aggressively H5Fclose() deals with objects within a file that + * remain open when H5Fclose() is called to close that file. + * + * \since 1.6.0 + * + */ +H5_DLL herr_t H5Pget_fclose_degree(hid_t fapl_id, H5F_close_degree_t *degree); +H5_DLL herr_t H5Pget_file_image(hid_t fapl_id, void **buf_ptr_ptr, size_t *buf_len_ptr); +H5_DLL herr_t H5Pget_file_image_callbacks(hid_t fapl_id, + H5FD_file_image_callbacks_t *callbacks_ptr); +H5_DLL herr_t H5Pget_file_locking(hid_t fapl_id, hbool_t *use_file_locking, hbool_t *ignore_when_disabled); +/** + * \ingroup FAPL + * + * \brief Returns garbage collecting references setting + * + * \fapl_id + * \param[out] gc_ref Flag returning the state of reference garbage + * collection. A returned value of 1 indicates that + * garbage collection is on while 0 indicates that + * garbage collection is off. + * + * \return \herr_t + * + * \details H5Pget_gc_references() returns the current setting for the + * garbage collection references property from the specified + * file access property list. The garbage collection references + * property is set by H5Pset_gc_references(). + * + * \since 1.2.0 + * + */ +H5_DLL herr_t H5Pget_gc_references(hid_t fapl_id, unsigned *gc_ref/*out*/); +/** + * \ingroup FAPL + * + * \brief Retrieves library version bounds settings that indirectly control + * the format versions used when creating objects + * + * \fapl_id{plist_id} + * \param[out] low The earliest version of the library that will be used + * for writing objects + * \param[out] high The latest version of the library that will be used for + * writing objects + * + * \return \herr_t + * + * \details H5Pget_libver_bounds() retrieves the lower and upper bounds on + * the HDF5 library release versions that indirectly determine the + * object format versions used when creating objects in the file. + * + * This property is retrieved from the file access property list + * specified by the parameter \p fapl_id. + * + * The value returned in the parameters \p low and \p high is one + * of the enumerated values in the #H5F_libver_t struct, which is + * defined in H5Fpublic.h. + * + * \version 1.10.2 Add #H5F_LIBVER_V18 to the enumerated defines in + * #H5F_libver_t + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pget_libver_bounds(hid_t plist_id, H5F_libver_t *low, + H5F_libver_t *high); +H5_DLL herr_t H5Pget_mdc_config(hid_t plist_id, + H5AC_cache_config_t * config_ptr); /* out */ +H5_DLL herr_t H5Pget_mdc_image_config(hid_t plist_id, H5AC_cache_image_config_t *config_ptr /*out*/); +H5_DLL herr_t H5Pget_mdc_log_options(hid_t plist_id, hbool_t *is_enabled, char *location, size_t *location_size, hbool_t *start_on_access); +H5_DLL herr_t H5Pget_meta_block_size(hid_t fapl_id, hsize_t *size/*out*/); +H5_DLL herr_t H5Pget_metadata_read_attempts(hid_t plist_id, unsigned *attempts); +/** + * \ingroup FAPL + * + * \brief Retrieves type of data property for MULTI driver + * + * \param[in] fapl_id File access property list or data transfer property + * list identifier + * \param[out] type Type of data + * + * \return \herr_t + * + * \details H5Pget_multi_type() retrieves the type of data setting from + * the file access or data transfer property list \p fapl_id. + * This enables a user application to specify the type of data + * the application wishes to access so that the application can + * retrieve a file handle for low-level access to the particular + * member of a set of MULTI files in which that type of data is + * stored. The file handle is retrieved with a separate call to + * H5Fget_vfd_handle() (or, in special circumstances, to + * H5FDget_vfd_handle(); see the Virtual File Layer documentation + * for more information. + * + * The type of data returned in \p type will be one of those + * listed in the discussion of the \p type parameter in the the + * description of the function H5Pset_multi_type(). + * + * Use of this function is only appropriate for an HDF5 file + * written as a set of files with the MULTI file driver. + * + * \since 1.6.0 + * + */ +H5_DLL herr_t H5Pget_multi_type(hid_t fapl_id, H5FD_mem_t *type); +H5_DLL herr_t H5Pget_object_flush_cb(hid_t plist_id, H5F_flush_cb_t *func, void **udata); +H5_DLL herr_t H5Pget_page_buffer_size(hid_t plist_id, size_t *buf_size, unsigned *min_meta_per, unsigned *min_raw_per); +H5_DLL herr_t H5Pget_sieve_buf_size(hid_t fapl_id, size_t *size/*out*/); +H5_DLL herr_t H5Pget_small_data_block_size(hid_t fapl_id, hsize_t *size/*out*/); +/** + * \ingroup FAPL + * + * \brief Returns the identifier of the current VOL connector + * + * \fapl_id{plist_id} + * \param[out] vol_id Current VOL connector identifier + * + * \return \herr_t + * + * \details H5Pget_vol_id() returns the VOL connector identifier \p vol_id for + * the file access property list \p plist_id. This identifier should + * be closed with H5VLclose(). + * + * \since 1.12.0 + * + */ +H5_DLL herr_t H5Pget_vol_id(hid_t plist_id, hid_t *vol_id); +/** + * \ingroup FAPL + * + * \brief Returns a copy of the VOL information for a connector + * + * \fapl_id{plist_id} + * \param[out] vol_info The VOL information for a connector + * + * \return \herr_t + * + * \details H5Pget_vol_info() returns a copy of the VOL information \p vol_info + * for a connector specified by the file access property list + * \p plist_id. + * + * \since 1.12.0 + * + */ +H5_DLL herr_t H5Pget_vol_info(hid_t plist_id, void **vol_info); +/** + * \ingroup FAPL + * + * \brief Sets alignment properties of a file access property list + * + * \fapl_id + * \param[in] threshold Threshold value. Note that setting the threshold + * value to 0 (zero) has the effect of a special case, + * forcing everything to be aligned + * \param[in] alignment Alignment value + * + * \return \herr_t + * + * \details H5Pset_alignment() sets the alignment properties of a + * file access property list so that any file object greater + * than or equal in size to \p threshold bytes will be aligned + * on an address which is a multiple of \p alignment. The + * addresses are relative to the end of the user block; the + * alignment is calculated by subtracting the user block size + * from the absolute file address and then adjusting the address + * to be a multiple of \p alignment. + * + * Default values for \p threshold and \p alignment are one, + * implying no alignment. Generally the default values will + * result in the best performance for single-process access to + * the file. For MPI IO and other parallel systems, choose an + * alignment which is a multiple of the disk block size. + * + * If the file space handling strategy is set to + * #H5F_FSPACE_STRATEGY_PAGE, then the alignment set via this + * routine is ignored. The file space handling strategy is set + * by H5Pset_file_space_strategy(). + * + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Pset_alignment(hid_t fapl_id, hsize_t threshold, + hsize_t alignment); +/** + * \ingroup FAPL + * + * \brief Sets the raw data chunk cache parameters + * + * \fapl_id{plist_id} + * \param[in] mdc_nelmts No longer used; any value passed is ignored + * \param[in] rdcc_nslots The number of chunk slots in the raw data chunk + * cache for this dataset. Increasing this value + * reduces the number of cache collisions, but + * slightly increases the memory used. Due to the + * hashing strategy, this value should ideally be a + * prime number. As a rule of thumb, this value + * should be at least 10 times the number of chunks + * that can fit in \p rdcc_nbytes bytes. For + * maximum performance, this value should be set + * approximately 100 times that number of chunks. + * The default value is 521. + * \param[in] rdcc_nbytes Total size of the raw data chunk cache in bytes. + * The default size is 1 MB per dataset. + * \param[in] rdcc_w0 The chunk preemption policy for all datasets. + * This must be between 0 and 1 inclusive and + * indicates the weighting according to which chunks + * which have been fully read or written are + * penalized when determining which chunks to flush + * from cache. A value of 0 means fully read or + * written chunks are treated no differently than + * other chunks (the preemption is strictly LRU) + * while a value of 1 means fully read or written + * chunks are always preempted before other chunks. + * If your application only reads or writes data once, + * this can be safely set to 1. Otherwise, this should + * be set lower depending on how often you re-read or + * re-write the same data. The default value is 0.75. + * If the value passed is #H5D_CHUNK_CACHE_W0_DEFAULT, + * then the property will not be set on the dataset + * access property list, and the parameter will come + * from the file access property list. + * + * \return \herr_t + * + * \details H5Pset_cache() sets the number of elements, the total number of + * bytes, and the preemption policy value for all datasets in a file + * on the file’s file access property list. + * + * The raw data chunk cache inserts chunks into the cache by first + * computing a hash value using the address of a chunk and then by + * using that hash value as the chunk’s index into the table of + * cached chunks. In other words, the size of this hash table and the + * number of possible hash values is determined by the \p rdcc_nslots + * parameter. If a different chunk in the cache has the same hash value, + * a collision will occur, which will reduce efficiency. If inserting + * the chunk into the cache would cause the cache to be too big, then + * the cache will be pruned according to the \p rdcc_w0 parameter. + * + * The \p mdc_nelmts parameter is no longer used; any value passed + * in that parameter will be ignored. + * + * \note \b Motivation: Setting raw data chunk cache parameters + * can be done with H5Pset_cache(), H5Pset_chunk_cache(), + * or a combination of both. H5Pset_cache() is used to + * adjust the chunk cache parameters for all datasets via + * a global setting for the file, and H5Pset_chunk_cache() + * is used to adjust the chunk cache parameters for + * individual datasets. When both are used, parameters + * set with H5Pset_chunk_cache() will override any parameters + * set with H5Pset_cache(). + * + * \note Optimum chunk cache parameters may vary widely depending + * on different data layout and access patterns. For datasets + * with low performance requirements for example, changing + * the cache settings can save memory. + * + * \note Note: Raw dataset chunk caching is not currently + * supported when using the MPI I/O and MPI POSIX file drivers + * in read/write mode; see H5Pset_fapl_mpio() and + * H5Pset_fapl_mpiposix(), respectively. When using one of these + * file drivers, all calls to H5Dread() and H5Dwrite() will access + * the disk directly, and H5Pset_cache() will have no effect on + * performance. + * + * \note Raw dataset chunk caching is supported when these drivers are + * used in read-only mode. + * + * \todo Check on H5Pset_fapl_mpio() and H5Pset_fapl_mpiposix(). + * + * \version 1.8.0 The use of the \p mdc_nelmts parameter was discontinued. + * Metadata cache configuration is managed with + * H5Pset_mdc_config() and H5Pget_mdc_config(). + * \version 1.6.0 The \p rdcc_nbytes and \p rdcc_nelmts parameters + * changed from type int to size_t. + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Pset_cache(hid_t plist_id, int mdc_nelmts, + size_t rdcc_nslots, size_t rdcc_nbytes, + double rdcc_w0); +H5_DLL herr_t H5Pset_core_write_tracking(hid_t fapl_id, hbool_t is_enabled, size_t page_size); +/** + * \ingroup FAPL + * + * \brief Sets a file driver + * + * \plist_id + * \param[in] driver_id The new driver identifier + * \param[in] driver_info Optional struct containing driver properties + * + * \return \herr_t + * + * \details H5Pset_driver() sets the file driver, driver_id, for a file + * access or data transfer property list, \p plist_id, and + * supplies an optional struct containing the driver-specific + * properties, \p driver_info. + * + * The driver properties will be copied into the property list + * and the reference count on the driver will be incremented, + * allowing the caller to close the driver identifier but still + * use the property list. + * + * \version 1.8.2 Function publicized in this release; previous releases + * described this function only in the virtual file driver + * documentation. + * + */ +H5_DLL herr_t H5Pset_driver(hid_t plist_id, hid_t driver_id, + const void *driver_info); H5_DLL herr_t H5Pset_elink_file_cache_size(hid_t plist_id, unsigned efc_size); -H5_DLL herr_t H5Pget_elink_file_cache_size(hid_t plist_id, unsigned *efc_size); +H5_DLL herr_t H5Pset_evict_on_close(hid_t fapl_id, hbool_t evict_on_close); +H5_DLL herr_t H5Pset_family_offset(hid_t fapl_id, hsize_t offset); +/** + * \ingroup FAPL + * + * \brief Sets the file close degree + * + * \fapl_id + * \param[in] degree Pointer to a location containing the file close + * degree property, the value of \p degree + * + * \return \herr_t + * + * \details H5Pset_fclose_degree() sets the file close degree property + * \p degree in the file access property list \p fapl_id. + * + * The value of \p degree determines how aggressively + * H5Fclose() deals with objects within a file that remain open + * when H5Fclose() is called to close that file. \p degree can + * have any one of four valid values: + * + * <table> + * <tr> + * <th>Degree name</th> + * <th>H5Fclose behavior with no open object in file</th> + * <th>H5Fclose behavior with open object(s) in file</th> + * </tr> + * <tr> + * <td>#H5F_CLOSE_WEAK</td> + * <td>Actual file is closed.</td> + * <td>Access to file identifier is terminated; actual file + * close is delayed until all objects in file are closed + * </td> + * </tr> + * <tr> + * <td>#H5F_CLOSE_SEMI</td> + * <td>Actual file is closed.</td> + * <td>Function returns FAILURE</td> + * </tr> + * <tr> + * <td>#H5F_CLOSE_STRONG</td> + * <td>Actual file is closed.</td> + * <td>All open objects remaining in the file are closed then + * file is closed</td> + * </tr> + * <tr> + * <td>#H5F_CLOSE_DEFAULT</td> + * <td>The VFL driver chooses the behavior. Currently, all VFL + * drivers set this value to #H5F_CLOSE_WEAK, except for the + * MPI-I/O driver, which sets it to #H5F_CLOSE_SEMI.</td> + * <td></td> + * </tr> + * + * </table> + * \warning If a file is opened multiple times without being closed, each + * open operation must use the same file close degree setting. + * For example, if a file is already open with #H5F_CLOSE_WEAK, + * an H5Fopen() call with #H5F_CLOSE_STRONG will fail. + * + * \since 1.6.0 + * + */ +H5_DLL herr_t H5Pset_fclose_degree(hid_t fapl_id, H5F_close_degree_t degree); H5_DLL herr_t H5Pset_file_image(hid_t fapl_id, void *buf_ptr, size_t buf_len); -H5_DLL herr_t H5Pget_file_image(hid_t fapl_id, void **buf_ptr_ptr, size_t *buf_len_ptr); H5_DLL herr_t H5Pset_file_image_callbacks(hid_t fapl_id, H5FD_file_image_callbacks_t *callbacks_ptr); -H5_DLL herr_t H5Pget_file_image_callbacks(hid_t fapl_id, H5FD_file_image_callbacks_t *callbacks_ptr); -H5_DLL herr_t H5Pset_core_write_tracking(hid_t fapl_id, hbool_t is_enabled, size_t page_size); -H5_DLL herr_t H5Pget_core_write_tracking(hid_t fapl_id, hbool_t *is_enabled, size_t *page_size); -H5_DLL herr_t H5Pset_metadata_read_attempts(hid_t plist_id, unsigned attempts); -H5_DLL herr_t H5Pget_metadata_read_attempts(hid_t plist_id, unsigned *attempts); -H5_DLL herr_t H5Pset_object_flush_cb(hid_t plist_id, H5F_flush_cb_t func, void *udata); -H5_DLL herr_t H5Pget_object_flush_cb(hid_t plist_id, H5F_flush_cb_t *func, void **udata); +H5_DLL herr_t H5Pset_file_locking(hid_t fapl_id, hbool_t use_file_locking, hbool_t ignore_when_disabled); +H5_DLL herr_t H5Pset_gc_references(hid_t fapl_id, unsigned gc_ref); +/** + * \ingroup FAPL + * + * \brief Controls the range of library release versions used when creating + * objects in a file + * + * \fapl_id{plist_id} + * \param[in] low The earliest version of the library that will be used + * for writing objects + * \param[in] high The latest version of the library that will be used for + * writing objects + * + * \return \herr_t + * + * \details H5Pset_libver_bounds() controls the range of library release + * versions that will be used when creating objects in a file. + * The object format versions are determined indirectly from the + * library release versions specified in the call. + * + * This property is set in the file access property list + * specified by the parameter \p fapl_id. + * + * The parameter \p low sets the earliest possible format + * versions that the library will use when creating objects in + * the file. Note that earliest possible is different from + * earliest, as some features introduced in library versions + * later than 1.0.0 resulted in updates to object formats. + * The parameter \p high sets the latest format versions that + * the library will be allowed to use when creating objects in + * the file. + * + * The parameters \p low and \p high must be one of the + * enumerated values in the #H5F_libver_t struct, which is + * defined in H5Fpublic.h. + * + * The macro #H5F_LIBVER_LATEST is aliased to the highest + * enumerated value in #H5F_libver_t, indicating that this is + * currently the latest format available. + * + * The library supports the following five pairs of + * (\p low, \p high) combinations as derived from the values + * in #H5F_libver_t: + * + * <table> + * <tr> + * <th>Value of \p low and \p high</th> + * <th>Result</th> + * </tr> + * <tr> + * <td>\p low=#H5F_LIBVER_EARLIEST<br /> + * \p high=#H5F_LIBVER_V18</td> + * <td> + * \li The library will create objects with the earliest + * possible format versions. + * \li The library will allow objects to be created with the + * latest format versions available to library release 1.8.x. + * \li API calls that create objects or features that are + * available to versions of the library greater than 1.8.x + * release will fail. + * </td> + * </tr> + * <tr> + * <td>\p low=#H5F_LIBVER_EARLIEST<br /> + * \p high=#H5F_LIBVER_V110</td> + * <td> + * \li The library will create objects with the earliest possible + * format versions. + * \li The library will allow objects to be created with the latest + * format versions available to library release 1.10.x. + * Since 1.10.x is also #H5F_LIBVER_LATEST, there is no upper + * limit on the format versions to use. For example, if a newer + * format version is required to support a feature e.g. virtual + * dataset, this setting will allow the object to be created. + * \li This is the library default setting and provides the greatest + * format compatibility. + * </td> + * </tr> + * <tr> + * <td>\p low=#H5F_LIBVER_V18<br /> + * \p high=#H5F_LIBVER_V18</td> + * <td> + * \li The library will create objects with the latest format versions + * available to library release 1.8.x. + * \li API calls that create objects or features that are available + * to versions of the library greater than 1.8.x release will fail. + * \li Earlier versions of the library may not be able to access + * objects created with this setting.</td> + * </tr> + * <tr> + * <td>\p low=#H5F_LIBVER_V18<br /> + * \p high=#H5F_LIBVER_V110</td> + * <td> + * \li The library will create objects with the latest format versions + * available to library release 1.8.x. + * \li The library will allow objects to be created with the latest + * format versions available to library release 1.10.x. + * Since 1.10.x is also #H5F_LIBVER_LATEST, there is no upper limit + * on the format versions to use. For example, if a newer format + * version is required to support a feature e.g. virtual dataset, + * this setting will allow the object to be created. + * \li Earlier versions of the library may not be able to access + * objects created with this setting.</td> + * </tr> + * <tr> + * <td>\p low=#H5F_LIBVER_V110<br /> + * \p high=#H5F_LIBVER_V110 + * </td> + * <td> + * \li The library will create objects with the latest format versions + * available to library release 1.10.x. + * \li The library will allow objects to be created with the latest + * format versions available to library release 1.10.x. + * Since 1.10.x is also #H5F_LIBVER_LATEST, there is no upper limit + * on the format versions to use. For example, if a newer format + * version is required to support a feature e.g. virtual dataset, + * this setting will allow the object to be created. + * \li This setting allows users to take advantage of the latest + * features and performance enhancements in the library. However, + * objects written with this setting may be accessible to a smaller + * range of library versions than would be the case if low is set + * to #H5F_LIBVER_EARLIEST. + * \li Earlier versions of the library may not be able to access objects created with this setting. + * </td> + * </tr> + * </table> + * + * \version 1.10.2 #H5F_LIBVER_V18 added to the enumerated defines in #H5F_libver_t. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pset_libver_bounds(hid_t plist_id, H5F_libver_t low, + H5F_libver_t high); +H5_DLL herr_t H5Pset_mdc_config(hid_t plist_id, H5AC_cache_config_t *config_ptr); H5_DLL herr_t H5Pset_mdc_log_options(hid_t plist_id, hbool_t is_enabled, const char *location, hbool_t start_on_access); -H5_DLL herr_t H5Pget_mdc_log_options(hid_t plist_id, hbool_t *is_enabled, char *location, - size_t *location_size, hbool_t *start_on_access); -H5_DLL herr_t H5Pset_evict_on_close(hid_t fapl_id, hbool_t evict_on_close); -H5_DLL herr_t H5Pget_evict_on_close(hid_t fapl_id, hbool_t *evict_on_close); -H5_DLL herr_t H5Pset_file_locking(hid_t fapl_id, hbool_t use_file_locking, hbool_t ignore_when_disabled); -H5_DLL herr_t H5Pget_file_locking(hid_t fapl_id, hbool_t *use_file_locking, hbool_t *ignore_when_disabled); +H5_DLL herr_t H5Pset_meta_block_size(hid_t fapl_id, hsize_t size); +H5_DLL herr_t H5Pset_metadata_read_attempts(hid_t plist_id, unsigned attempts); +H5_DLL herr_t H5Pset_multi_type(hid_t fapl_id, H5FD_mem_t type); +H5_DLL herr_t H5Pset_object_flush_cb(hid_t plist_id, H5F_flush_cb_t func, void *udata); +H5_DLL herr_t H5Pset_sieve_buf_size(hid_t fapl_id, size_t size); +H5_DLL herr_t H5Pset_small_data_block_size(hid_t fapl_id, hsize_t size); +/** + * \ingroup FAPL + * + * \brief Set the file VOL connector for a file access property list + * + * \fapl_id{plist_id} + * \param[in] new_vol_id VOL connector identifier + * \param[in] new_vol_info Optional VOL information + * + * \return \herr_t + * + * \details H5Pset_vol() sets the VOL connector \p new_vol_id for a file access + * property list \p plist_id using the (optional) VOL information in + * \p new_vol_info. + * + * \since 1.12.0 + * + */ +H5_DLL herr_t H5Pset_vol(hid_t plist_id, hid_t new_vol_id, const void *new_vol_info); + #ifdef H5_HAVE_PARALLEL H5_DLL herr_t H5Pset_all_coll_metadata_ops(hid_t plist_id, hbool_t is_collective); H5_DLL herr_t H5Pget_all_coll_metadata_ops(hid_t plist_id, hbool_t *is_collective); @@ -578,14 +3967,92 @@ H5_DLL herr_t H5Pget_mpi_params(hid_t fapl_id, MPI_Comm *comm, MPI_Info *info); H5_DLL herr_t H5Pset_mpi_params(hid_t fapl_id, MPI_Comm comm, MPI_Info info); #endif /* H5_HAVE_PARALLEL */ H5_DLL herr_t H5Pset_mdc_image_config(hid_t plist_id, H5AC_cache_image_config_t *config_ptr); -H5_DLL herr_t H5Pget_mdc_image_config(hid_t plist_id, H5AC_cache_image_config_t *config_ptr /*out*/); H5_DLL herr_t H5Pset_page_buffer_size(hid_t plist_id, size_t buf_size, unsigned min_meta_per, unsigned min_raw_per); -H5_DLL herr_t H5Pget_page_buffer_size(hid_t plist_id, size_t *buf_size, unsigned *min_meta_per, - unsigned *min_raw_per); /* Dataset creation property list (DCPL) routines */ - +/** + * \ingroup DCPL + * + * \brief Determines whether fill value is defined + * + * \dcpl_id{plist} + * \param[out] status Status of fill value in property list + * + * \return \herr_t + * + * \details H5Pfill_value_defined() determines whether a fill value is + * defined in the dataset creation property list \p plist. Valid + * values returned in status are as follows: + * + * <table> + * <tr> + * <td>#H5D_FILL_VALUE_UNDEFINED</td> + * <td>Fill value is undefined.</td> + * </tr> + * <tr> + * <td>#H5D_FILL_VALUE_DEFAULT</td> + * <td>Fill value is the library default.</td> + * </tr> + * <tr> + * <td>#H5D_FILL_VALUE_USER_DEFINED</td> + * <td>Fill value is defined by the application.</td> + * </tr> + * </table> + * + * \since 1.6.0 + * + */ +H5_DLL herr_t H5Pfill_value_defined(hid_t plist, H5D_fill_value_t *status); +/** + * \ingroup DCPL + * + * \brief Retrieves the timing for storage space allocation + * + * \dcpl_id{plist_id} + * \param[out] alloc_time The timing setting for allocating dataset + * storage space + * + * \return \herr_t + * + * \details H5Pget_alloc_time() retrieves the timing for allocating storage + * space for a dataset's raw data. This property is set in the + * dataset creation property list \p plist_id. The timing setting + * is returned in \p alloc_time as one of the following values: + * + * <table> + * <tr> + * <td>#H5D_ALLOC_TIME_DEFAULT<br /> </td> + * <td>Uses the default allocation time, based on the dataset + * storage method. <br />See the \p alloc_time description in + * H5Pset_alloc_time() for default allocation times for + * various storage methods.</td> + * </tr> + * <tr> + * <td>#H5D_ALLOC_TIME_EARLY</td> + * <td>All space is allocated when the dataset is created.</td> + * </tr> + * <tr> + * <td>#H5D_ALLOC_TIME_INCR</td> + * <td>Space is allocated incrementally as data is written + * to the dataset.</td> + * </tr> + * <tr> + * <td>#H5D_ALLOC_TIME_LATE</td> + * <td>All space is allocated when data is first written to + * the dataset.</td> + * </tr> + * </table> + * + * \note H5Pget_alloc_time() is designed to work in concert with the + * dataset fill value and fill value write time properties, set + * with the functions H5Pget_fill_value() and H5Pget_fill_time(). + * + * \since 1.6.0 + * + */ +H5_DLL herr_t H5Pget_alloc_time(hid_t plist_id, H5D_alloc_time_t + *alloc_time/*out*/); /** * \ingroup DCPL * @@ -607,9 +4074,8 @@ H5_DLL herr_t H5Pget_page_buffer_size(hid_t plist_id, size_t *buf_size, unsigned * \since 1.0.0 * */ -H5_DLL int H5Pget_chunk(hid_t plist_id, int max_ndims, hsize_t dim[] /*out*/); +H5_DLL int H5Pget_chunk(hid_t plist_id, int max_ndims, hsize_t dim[]/*out*/); /** - *------------------------------------------------------------------------- * * \ingroup DCPL * @@ -636,8 +4102,81 @@ H5_DLL int H5Pget_chunk(hid_t plist_id, int max_ndims, hsize_t dim[] /*out*/); */ H5_DLL herr_t H5Pget_chunk_opts(hid_t plist_id, unsigned *opts); /** - *------------------------------------------------------------------------- + * \ingroup DCPL + * + * \brief Retrieves the setting for whether or not to create minimized + * dataset object headers + * + * \dcpl_id + * \param[out] minimize Flag indicating whether the library will or will + * not create minimized dataset object headers + * + * \return \herr_t + * + * \details H5Pget_dset_no_attrs_hint() retrieves the + * <i>no dataset attributes</i> hint setting for the dataset + * creation property list \p dcpl_id. This setting is used to + * inform the library to create minimized dataset object headers + * when TRUE. The setting value is returned in the boolean pointer + * \p minimize. + * + * \since 1.10.5 + * + */ +H5_DLL herr_t H5Pget_dset_no_attrs_hint(hid_t dcpl_id, hbool_t *minimize); +/** + * \ingroup DCPL + * + * \brief Returns information about an external file + * + * \dcpl_id{plist_id} + * \param[in] idx External file index + * \param[in] name_size Maximum length of \p name array + * \param[out] name Name of the external file + * \param[out] offset Pointer to a location to return an offset value + * \param[out] size Pointer to a location to return the size of the + * external file data + * + * \return \herr_t + * + * \details H5Pget_external() returns information about an external file. + * The external file is specified by its index, \p idx, which + * is a number from zero to N-1, where N is the value returned + * by H5Pget_external_count(). At most \p name_size characters + * are copied into the \p name array. If the external file name + * is longer than \p name_size with the null terminator, the + * return value is not null terminated (similar to strncpy()). + * + * If \p name_size is zero or \p name is the null pointer, the + * external file name is not returned. If \p offset or \p size + * are null pointers then the corresponding information is not + * returned. + * + * \version 1.6.4 \p idx parameter type changed to unsigned. + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Pget_external(hid_t plist_id, unsigned idx, size_t name_size, + char *name/*out*/, off_t *offset/*out*/, + hsize_t *size/*out*/); +/** + * \ingroup DCPL + * + * \brief Returns the number of external files for a dataset + * + * \dcpl_id{plist_id} + * + * \return Returns the number of external files if successful; otherwise + * returns a negative value. * + * \details H5Pget_external_count() returns the number of external files + * for the specified dataset. + * + * \since 1.0.0 + * + */ +H5_DLL int H5Pget_external_count(hid_t plist_id); +/** * \ingroup DCPL * * \brief Retrieves the time when fill values are written to a dataset @@ -680,10 +4219,9 @@ H5_DLL herr_t H5Pget_chunk_opts(hid_t plist_id, unsigned *opts); * \since 1.6.0 * */ -H5_DLL herr_t H5Pget_fill_time(hid_t plist_id, H5D_fill_time_t *fill_time /*out*/); +H5_DLL herr_t H5Pget_fill_time(hid_t plist_id, H5D_fill_time_t + *fill_time/*out*/); /** - *------------------------------------------------------------------------- - * * \ingroup DCPL * * \brief Retrieves a dataset fill value @@ -719,9 +4257,9 @@ H5_DLL herr_t H5Pget_fill_time(hid_t plist_id, H5D_fill_time_t *fill_time /*out* * \since 1.0.0 * */ -H5_DLL herr_t H5Pget_fill_value(hid_t plist_id, hid_t type_id, void *value /*out*/); +H5_DLL herr_t H5Pget_fill_value(hid_t plist_id, hid_t type_id, + void *value/*out*/); /** - *------------------------------------------------------------------------- * \ingroup DCPL * * \brief Returns the layout of the raw data for a dataset @@ -757,7 +4295,224 @@ H5_DLL herr_t H5Pget_fill_value(hid_t plist_id, hid_t type_id, void *value /*out */ H5_DLL H5D_layout_t H5Pget_layout(hid_t plist_id); /** - *------------------------------------------------------------------------- + * \ingroup DCPL + * + * \brief Gets the number of mappings for the virtual dataset + * + * \dcpl_id + * \param[out] count The number of mappings + * + * \return \herr_t + * + * \details H5Pget_virtual_count() gets the number of mappings for a + * virtual dataset that has the creation property list specified + * by \p dcpl_id. + * + * \virtual + * + * \since 1.10.0 + * + */ +H5_DLL herr_t H5Pget_virtual_count(hid_t dcpl_id, size_t *count/*out*/); +/** + * \ingroup DCPL + * + * \brief Gets the name of a source dataset used in the mapping + * + * \dcpl_id + * \param[in] index Mapping index. The value of \p index is 0 (zero) or + * greater and less than \p count + * (0 ≤ \p index < \p count), where \p count is the + * number of mappings returned by H5Pget_virtual_count(). + * \param[out] name A buffer containing the name of the source dataset + * \param[in] size The size, in bytes, of the name buffer. Must be the + * size of the dataset name in bytes plus 1 for a NULL + * terminator + * + * \return Returns the length of the dataset name if successful; + * otherwise returns a negative value. + * + * \details H5Pget_virtual_dsetname() takes the dataset creation property + * list for the virtual dataset, \p dcpl_id, the mapping index, + * \p index, the size of the dataset name for a source dataset, + * \p size, and retrieves the name of the source dataset used in + * the mapping. + * + * Up to \p size characters of the dataset name are returned in + * \p name; additional characters, if any, are not returned to + * the user application. + * + * If the length of the dataset name, which determines the + * required value of \p size, is unknown, a preliminary call + * to H5Pget_virtual_dsetname() with the last two parameters + * set to NULL and zero respectively can be made. The return + * value of this call will be the size in bytes of the dataset + * name. That value, plus 1 for a NULL terminator, must then be + * assigned to \p size for a second H5Pget_virtual_dsetname() + * call, which will retrieve the actual dataset name. + * + * \virtual + * + * \since 1.10.0 + * + */ +H5_DLL ssize_t H5Pget_virtual_dsetname(hid_t dcpl_id, size_t index, + char *name/*out*/, size_t size); +/** + * \ingroup DCPL + * + * \brief Gets the filename of a source dataset used in the mapping + * + * \dcpl_id + * \param[in] index Mapping index. The value of \p index is 0 (zero) or + * greater and less than \p count + * (0 ≤ \p index < \p count), where \p count is the + * number of mappings returned by H5Pget_virtual_count(). + * \param[out] name A buffer containing the name of the file containing + * the source dataset + * \param[in] size The size, in bytes, of the name buffer. Must be the + * size of the filename in bytes plus 1 for a NULL + * terminator + * + * \return Returns the length of the filename if successful; otherwise + * returns a negative value. + * + * \details H5Pget_virtual_filename() takes the dataset creation property + * list for the virtual dataset, \p dcpl_id, the mapping index, + * \p index, the size of the filename for a source dataset, + * \p size, and retrieves the name of the file for a source dataset + * used in the mapping. + * + * Up to \p size characters of the filename are returned in + * \p name; additional characters, if any, are not returned to + * the user application. + * + * If the length of the filename, which determines the required + * value of \p size, is unknown, a preliminary call to + * H5Pget_virtual_filename() with the last two parameters set + * to NULL and zero respectively can be made. The return value + * of this call will be the size in bytes of the filename. That + * value, plus 1 for a NULL terminator, must then be assigned to + * \p size for a second H5Pget_virtual_filename() call, which + * will retrieve the actual filename. + * + * \virtual + * + * \since 1.10.0 + * + */ +H5_DLL ssize_t H5Pget_virtual_filename(hid_t dcpl_id, size_t index, + char *name/*out*/, size_t size); +/** + * \ingroup DCPL + * + * \brief Gets a dataspace identifier for the selection within the source + * dataset used in the mapping + * + * \dcpl_id + * \param[in] index Mapping index. The value of \p index is 0 (zero) or + * greater and less than \p count + * (0 ≤ \p index < \p count), where \p count is the number + * of mappings returned by H5Pget_virtual_count(). + * + * \return \hid_t{valid dataspace identifier} + * + * \details H5Pget_virtual_srcspace() takes the dataset creation property + * list for the virtual dataset, \p dcpl_id, and the mapping + * index, \p index, and returns a dataspace identifier for the + * selection within the source dataset used in the mapping. + * + * \virtual + * + * \since 1.10.0 + * + */ +H5_DLL hid_t H5Pget_virtual_srcspace(hid_t dcpl_id, size_t index); +/** + * \ingroup DCPL + * + * \brief Gets a dataspace identifier for the selection within the virtual + * dataset used in the mapping + * + * \dcpl_id + * \param[in] index Mapping index. The value of \p index is 0 (zero) or + * greater and less than \p count + * (0 ≤ \p index < \p count), where \p count is the number + * of mappings returned by H5Pget_virtual_count() + * + * \return \hid_t{valid dataspace identifier} + * + * \details H5Pget_virtual_vspace() takes the dataset creation property + * list for the virtual dataset, \p dcpl_id, and the mapping + * index, \p index, and returns a dataspace identifier for the + * selection within the virtual dataset used in the mapping. + * + * \virtual + * + * \since 1.10.0 + * + */ +H5_DLL hid_t H5Pget_virtual_vspace(hid_t dcpl_id, size_t index); +/** + * \ingroup DCPL + * + * \brief Sets the timing for storage space allocation + * + * \dcpl_id{plist_id} + * \param[in] alloc_time When to allocate dataset storage space + * + * \return \herr_t + * + * \details H5Pset_alloc_time() sets up the timing for the allocation of + * storage space for a dataset's raw data. This property is set + * in the dataset creation property list \p plist_id. Timing is + * specified in \p alloc_time with one of the following values: + * + * <table> + * <tr> + * <td>#H5D_ALLOC_TIME_DEFAULT</td> + * <td>Allocate dataset storage space at the default time<br /> + * (Defaults differ by storage method.)</td> + * </tr> + * <tr> + * <td>#H5D_ALLOC_TIME_EARLY</td> + * <td>Allocate all space when the dataset is created<br /> + * (Default for compact datasets.)</td> + * </tr> + * <tr> + * <td>#H5D_ALLOC_TIME_INCR</td> + * <td>Allocate space incrementally, as data is written to + * the dataset<br />(Default for chunked storage datasets.) + * + * \li Chunked datasets: Storage space allocation for each + * chunk is deferred until data is written to the chunk. + * \li Contiguous datasets: Incremental storage space + * allocation for contiguous data is treated as late + * allocation. + * \li Compact datasets: Incremental allocation is not + * allowed with compact datasets; H5Pset_alloc_time() + * will return an error.</td> + * </tr> + * <tr> + * <td>#H5D_ALLOC_TIME_LATE</td> + * <td>Allocate all space when data is first written to the + * dataset<br /> + * (Default for contiguous datasets.)</td> + * </tr> + * </table> + * + * \note H5Pset_alloc_time() is designed to work in concert with the + * dataset fill value and fill value write time properties, set + * with the functions H5Pset_fill_value() and H5Pset_fill_time(). + * + * \note See H5Dcreate() for further cross-references. + * + * \since 1.6.0 + * + */ +H5_DLL herr_t H5Pset_alloc_time(hid_t plist_id, H5D_alloc_time_t + alloc_time); +/** * \ingroup DCPL * * \brief Sets the size of the chunks used to store a chunked layout @@ -801,8 +4556,6 @@ H5_DLL H5D_layout_t H5Pget_layout(hid_t plist_id); */ H5_DLL herr_t H5Pset_chunk(hid_t plist_id, int ndims, const hsize_t dim[/*ndims*/]); /** - *------------------------------------------------------------------------- - * * \ingroup DCPL * * \brief Sets the edge chunk option in a dataset creation property list @@ -842,8 +4595,80 @@ H5_DLL herr_t H5Pset_chunk(hid_t plist_id, int ndims, const hsize_t dim[/*ndims* */ H5_DLL herr_t H5Pset_chunk_opts(hid_t plist_id, unsigned opts); /** - *------------------------------------------------------------------------- + * \ingroup DCPL + * + * \brief Sets the flag to create minimized dataset object headers + * + * \dcpl_id + * \param[in] minimize Flag for indicating whether or not a dataset's + * object header will be minimized + * + * \return \herr_t + * + * \details H5Pset_dset_no_attrs_hint() sets the no dataset attributes + * hint setting for the dataset creation property list \p dcpl_id. + * Datasets created with the dataset creation property list + * \p dcpl_id will have their object headers minimized if the + * boolean flag \p minimize is set to TRUE. By setting \p minimize + * to TRUE, the library expects that no attributes will be added + * to the dataset. Attributes can be added, but they are appended + * with a continuation message, which can reduce performance. * + * This setting interacts with H5Fset_dset_no_attrs_hint(): if + * either is set to TRUE, then the created dataset's object header + * will be minimized. + * + * \since 1.10.5 + * + */ +H5_DLL herr_t H5Pset_dset_no_attrs_hint(hid_t dcpl_id, hbool_t minimize); +/** + * \ingroup DCPL + * + * \brief Adds an external file to the list of external files + * + * \dcpl_id{plist_id} + * \param[in] name Name of an external file + * \param[in] offset Offset, in bytes, from the beginning of the file to + * the location in the file where the data starts + * \param[in] size Number of bytes reserved in the file for the data + * + * \return \herr_t + * + * \details The first call to H5Pset_external() sets the external + * storage property in the property list, thus designating that + * the dataset will be stored in one or more non-HDF5 file(s) + * external to the HDF5 file. This call also adds the file + * \p name as the first file in the list of external files. + * Subsequent calls to the function add the named file as the + * next file in the list. + * + * If a dataset is split across multiple files, then the files + * should be defined in order. The total size of the dataset is + * the sum of the \p size arguments for all the external files. + * If the total size is larger than the size of a dataset then + * the dataset can be extended (provided the data space also + * allows the extending). + * + * The \p size argument specifies the number of bytes reserved + * for data in the external file. If \p size is set to + * #H5F_UNLIMITED, the external file can be of unlimited size + * and no more files can be added to the external files list. + * If \p size is set to 0 (zero), no external file will actually + * be created. + * + * All of the external files for a given dataset must be specified + * with H5Pset_external() before H5Dcreate() is called to create + * the dataset. If one these files does not exist on the system + * when H5Dwrite() is called to write data to it, the library + * will create the file. + * + * \since 1.0.0 + * + */ +H5_DLL herr_t H5Pset_external(hid_t plist_id, const char *name, off_t offset, + hsize_t size); +/** * \ingroup DCPL * * \brief Sets the time when fill values are written to a dataset @@ -886,8 +4711,6 @@ H5_DLL herr_t H5Pset_chunk_opts(hid_t plist_id, unsigned opts); */ H5_DLL herr_t H5Pset_fill_time(hid_t plist_id, H5D_fill_time_t fill_time); /** - *------------------------------------------------------------------------- - * * \ingroup DCPL * * \brief Sets the fill value for a dataset @@ -936,10 +4759,9 @@ H5_DLL herr_t H5Pset_fill_time(hid_t plist_id, H5D_fill_time_t fill_time); * \since 1.0.0 * */ -H5_DLL herr_t H5Pset_fill_value(hid_t plist_id, hid_t type_id, const void *value); +H5_DLL herr_t H5Pset_fill_value(hid_t plist_id, hid_t type_id, + const void *value); /** - *------------------------------------------------------------------------- - * * \ingroup DCPL * * \brief Sets up use of the shuffle filter @@ -974,7 +4796,6 @@ H5_DLL herr_t H5Pset_fill_value(hid_t plist_id, hid_t type_id, const void *value */ H5_DLL herr_t H5Pset_shuffle(hid_t plist_id); /** - *------------------------------------------------------------------------- * \ingroup DCPL * * \brief Sets the type of storage used to store the raw data for a dataset @@ -1011,8 +4832,208 @@ H5_DLL herr_t H5Pset_shuffle(hid_t plist_id); * */ H5_DLL herr_t H5Pset_layout(hid_t plist_id, H5D_layout_t layout); +//! [nbit_code_snip] +/* +hid_t nbit_datatype = H5Tcopy(H5T_STD_I32LE); +H5Tset_precision(nbit_datatype, 16); +H5Tset_offset(nbit_datatype, 4); +*/ +//! [nbit_code_snip] +/** + * \ingroup DCPL + * + * \brief Sets up the use of the N-Bit filter + * + * \dcpl_id{plist_id} + * + * \return \herr_t + * + * \details H5Pset_nbit() sets the N-Bit filter, #H5Z_FILTER_NBIT, in the + * dataset creation property list \p plist_id. + * + * The HDF5 user can create an N-Bit datatype with the following + * code: + * \snippet this nbit_code_snip + * + * In memory, one value of the N-Bit datatype in the above example + * will be stored on a little-endian machine as follows: + * + * <table> + * <tr> + * <td>byte 3</td> + * <td>byte 2</td> + * <td>byte 1</td> + * <td>byte 0</td> + * </tr> + * <tr> + * <td>????????</td> + * <td>????SPPP</td> + * <td>PPPPPPPP</td> + * <td>PPPP????</td> + * </tr> + * </table> + * Note: S - sign bit, P - significant bit, ? - padding bit; For + * signed integer, the sign bit is included in the precision. + * + * When data of the above datatype is stored on disk using the + * N-bit filter, all padding bits are chopped off and only + * significant bits are stored. The values on disk will be + * something like: + * + * <table> + * <tr> + * <td>1st value</td> + * <td>2nd value</td> + * <td>...</td> + * </tr> + * <tr> + * <td>SPPPPPPPPPPPPPPP</td> + * <td>SPPPPPPPPPPPPPPP</td> + * <td>...</td> + * </tr> + * </table> + * The N-Bit filter is used effectively for compressing data of + * an N-Bit datatype as well as a compound and an array + * datatype with N-Bit fields. However, the datatype classes of + * the N-Bit datatype or the N-Bit field of the compound + * datatype or the array datatype are limited to integer or + * floating-point. + * + * The N-Bit filter supports complex situations where a compound + * datatype contains member(s) of a compound datatype or an array + * datatype that has a compound datatype as the base type. + * However, it does not support the situation where an array + * datatype has a variable-length or variable-length string as + * its base datatype. The filter does support the situation where + * a variable-length or variable-length string is a member of a + * compound datatype. + * + * The N-Bit filter allows all other HDF5 datatypes (such as + * time, string, bitfield, opaque, reference, enum, and variable + * length) to pass through as a no-op. + * + * Like other I/O filters supported by the HDF5 library, + * application using the N-Bit filter must store data with + * chunked storage. + * + * By nature, the N-Bit filter should not be used together with + * other I/O filters. + * + * \version 1.8.8 Fortran subroutine introduced in this release. + * \todo fix "nbit_code_snip" + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pset_nbit(hid_t plist_id); +/** + * \ingroup DCPL + * + * \brief Sets up the use of the scale-offset filter + * + * \dcpl_id{plist_id} + * \param[in] scale_type Flag indicating compression method + * \param[in] scale_factor Parameter related to scale. Must be + * non-negative + * + * \return \herr_t + * + * \details H5Pset_scaleoffset() sets the scale-offset filter, + * #H5Z_FILTER_SCALEOFFSET, for a dataset. + * + * Generally speaking, scale-offset compression performs a scale and/or + * offset operation on each data value and truncates the resulting + * value to a minimum number of bits (MinBits) before storing it. The + * current scale-offset filter supports integer and floating-point + * datatypes. + * + * For an integer datatype, the parameter \p scale_type should be set + * to #H5Z_SO_INT (2). The parameter \p scale_factor denotes MinBits. + * If the user sets it to H5Z_SO_INT_MINBITS_DEFAULT (0), the filter + * will calculate MinBits. If \p scale_factor is set to a positive + * integer, the filter does not do any calculation and just uses the + * number as MinBits. However, if the user gives a MinBits that is less + * than what would be generated by the filter, the compression will be + * lossy. Also, the MinBits supplied by the user cannot exceed the + * number of bits to store one value of the dataset datatype. + * + * For a floating-point datatype, the filter adopts the GRiB data + * packing mechanism, which offers two alternate methods: E-scaling and + * D-scaling. Both methods are lossy compression. If the parameter + * \p scale_type is set to #H5Z_SO_FLOAT_DSCALE (0), the filter will + * use the D-scaling method; if it is set to #H5Z_SO_FLOAT_ESCALE (1), + * the filter will use the E-scaling method. Since only the D-scaling + * method is implemented, \p scale_type should be set to + * #H5Z_SO_FLOAT_DSCALE or 0. + * + * When the D-scaling method is used, the original data is "D" scaled + * — multiplied by 10 to the power of \p scale_factor, and the + * "significant" part of the value is moved to the left of the decimal + * point. Care should be taken in setting the decimal \p scale_factor + * so that the integer part will have enough precision to contain the + * appropriate information of the data value. For example, if + * \p scale_factor is set to 2, the number 104.561 will be 10456.1 + * after "D" scaling. The last digit 1 is not "significant" and is + * thrown off in the process of rounding. The user should make sure that + * after "D" scaling and rounding, the data values are within the range + * that can be represented by the integer (same size as the + * floating-point type). + * + * Valid values for scale_type are as follows: + * + * <table> + * <tr> + * <td>#H5Z_SO_FLOAT_DSCALE (0)</td> + * <td>Floating-point type, using variable MinBits method</td> + * </tr> + * <tr> + * <td>#H5Z_SO_FLOAT_ESCALE (1)</td> + * <td>Floating-point type, using fixed MinBits method</td> + * </tr> + * <tr> + * <td>#H5Z_SO_INT (2)</td> + * <td>Integer type</td> + * </tr> + * </table> + * + * The meaning of \p scale_factor varies according to the value + * assigned to \p scale_type: + * + * <table> + * <tr> + * <th>\p scale_type value</th> + * <th>\p scale_factor description</th> + * </tr> + * <tr> + * <td>#H5Z_SO_FLOAT_DSCALE</td> + * <td>Denotes the decimal scale factor for D-scaling and can be + * positive, negative or zero. This is the current + * implementation of the library.</td> + * </tr> + * <tr> + * <td>#H5Z_SO_FLOAT_ESCALE</td> + * <td>Denotes MinBits for E-scaling and must be a positive integer. + * This is not currently implemented by the library.</td> + * </tr> + * <tr> + * <td>#H5Z_SO_INT</td> + * <td>Denotes MinBits and it should be a positive integer or + * #H5Z_SO_INT_MINBITS_DEFAULT (0). If it is less than 0, the + * library will reset it to 0 since it is not implemented. + * </td> + * </tr> + * </table> + * Like other I/O filters supported by the HDF5 library, an + * application using the scale-offset filter must store data with + * chunked storage. + * + * \version 1.8.8 Fortran90 subroutine introduced in this release. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pset_scaleoffset(hid_t plist_id, H5Z_SO_scale_type_t scale_type, int scale_factor); /** - *------------------------------------------------------------------------- * \ingroup DCPL * * \brief Sets up use of the SZIP compression filter @@ -1165,66 +5186,682 @@ H5_DLL herr_t H5Pset_layout(hid_t plist_id, H5D_layout_t layout); * * \since 1.6.0 * - *-------------------------------------------------------------------------- - */ -H5_DLL herr_t H5Pset_szip(hid_t plist_id, unsigned options_mask, unsigned pixels_per_block); -H5_DLL herr_t H5Pset_virtual(hid_t dcpl_id, hid_t vspace_id, const char *src_file_name, - const char *src_dset_name, hid_t src_space_id); -H5_DLL herr_t H5Pget_virtual_count(hid_t dcpl_id, size_t *count /*out*/); -H5_DLL hid_t H5Pget_virtual_vspace(hid_t dcpl_id, size_t index); -H5_DLL hid_t H5Pget_virtual_srcspace(hid_t dcpl_id, size_t index); -H5_DLL ssize_t H5Pget_virtual_filename(hid_t dcpl_id, size_t index, char *name /*out*/, size_t size); -H5_DLL ssize_t H5Pget_virtual_dsetname(hid_t dcpl_id, size_t index, char *name /*out*/, size_t size); -H5_DLL herr_t H5Pset_external(hid_t plist_id, const char *name, off_t offset, hsize_t size); -H5_DLL int H5Pget_external_count(hid_t plist_id); -H5_DLL herr_t H5Pget_external(hid_t plist_id, unsigned idx, size_t name_size, char *name /*out*/, - off_t *offset /*out*/, hsize_t *size /*out*/); -H5_DLL herr_t H5Pset_nbit(hid_t plist_id); -H5_DLL herr_t H5Pset_scaleoffset(hid_t plist_id, H5Z_SO_scale_type_t scale_type, int scale_factor); -H5_DLL herr_t H5Pfill_value_defined(hid_t plist, H5D_fill_value_t *status); -H5_DLL herr_t H5Pset_alloc_time(hid_t plist_id, H5D_alloc_time_t alloc_time); -H5_DLL herr_t H5Pget_alloc_time(hid_t plist_id, H5D_alloc_time_t *alloc_time /*out*/); -H5_DLL herr_t H5Pget_dset_no_attrs_hint(hid_t dcpl_id, hbool_t *minimize); -H5_DLL herr_t H5Pset_dset_no_attrs_hint(hid_t dcpl_id, hbool_t minimize); + */ +H5_DLL herr_t H5Pset_szip(hid_t plist_id, unsigned options_mask, unsigned pixels_per_block); +H5_DLL herr_t H5Pset_virtual(hid_t dcpl_id, hid_t vspace_id, const char *src_file_name, + const char *src_dset_name, hid_t src_space_id); /* Dataset access property list (DAPL) routines */ -H5_DLL herr_t H5Pset_chunk_cache(hid_t dapl_id, size_t rdcc_nslots, size_t rdcc_nbytes, double rdcc_w0); -H5_DLL herr_t H5Pget_chunk_cache(hid_t dapl_id, size_t *rdcc_nslots /*out*/, size_t *rdcc_nbytes /*out*/, - double *rdcc_w0 /*out*/); -H5_DLL herr_t H5Pset_virtual_view(hid_t plist_id, H5D_vds_view_t view); -H5_DLL herr_t H5Pget_virtual_view(hid_t plist_id, H5D_vds_view_t *view); -H5_DLL herr_t H5Pset_virtual_printf_gap(hid_t plist_id, hsize_t gap_size); -H5_DLL herr_t H5Pget_virtual_printf_gap(hid_t plist_id, hsize_t *gap_size); -H5_DLL herr_t H5Pset_virtual_prefix(hid_t dapl_id, const char *prefix); -H5_DLL ssize_t H5Pget_virtual_prefix(hid_t dapl_id, char *prefix /*out*/, size_t size); -H5_DLL herr_t H5Pset_append_flush(hid_t plist_id, unsigned ndims, const hsize_t boundary[], - H5D_append_cb_t func, void *udata); -H5_DLL herr_t H5Pget_append_flush(hid_t plist_id, unsigned dims, hsize_t boundary[], H5D_append_cb_t *func, - void **udata); -H5_DLL herr_t H5Pset_efile_prefix(hid_t dapl_id, const char *prefix); -H5_DLL ssize_t H5Pget_efile_prefix(hid_t dapl_id, char *prefix /*out*/, size_t size); +/** + * \ingroup DAPL + * + * \brief Retrieves the values of the append property that is set up in + * the dataset access property list + * + * \dapl_id + * \param[in] dims The number of elements for \p boundary + * \param[in] boundary The dimension sizes used to determine the boundary + * \param[in] func The user-defined callback function + * \param[in] udata The user-defined input data + * + * \return \herr_t + * + * \details H5Pget_append_flush() obtains the following information + * from the dataset access property list, \p dapl_id. + * + * \p boundary consists of the sizes set up in the access + * property list that are used to determine when a dataset + * dimension size hits the boundary. Only at most \p dims + * boundary sizes are retrieved, and \p dims will not exceed + * the corresponding value that is set in the property list. + * + * \p func is the user-defined callback function to invoke when + * a dataset’s appended dimension size reaches a boundary and + * \p udata is the user-defined input data for the callback + * function. + * + * \todo Example Usage was removed and needs to be re-added + * + * \since 1.10.0 + * + */ +H5_DLL herr_t H5Pget_append_flush(hid_t dapl_id, unsigned dims, + hsize_t boundary[], H5D_append_cb_t *func, void **udata); +/** + * \ingroup DAPL + * + * \brief Retrieves the raw data chunk cache parameters + * + * \dapl_id + * \param[out] rdcc_nslots Number of chunk slots in the raw data chunk + * cache hash table + * \param[out] rdcc_nbytes Total size of the raw data chunk cache, in + * bytes + * \param[out] rdcc_w0 Preemption policy + * + * \return \herr_t + * + * \details H5Pget_chunk_cache() retrieves the number of chunk slots in + * the raw data chunk cache hash table, the maximum possible + * number of bytes in the raw data chunk cache, and the + * preemption policy value. + * + * These values are retrieved from a dataset access property + * list. If the values have not been set on the property list, + * then values returned will be the corresponding values from + * a default file access property list. + * + * Any (or all) pointer arguments may be null pointers, in which + * case the corresponding data is not returned. + * + * \since 1.8.3 + * + */ +H5_DLL herr_t H5Pget_chunk_cache(hid_t dapl_id, + size_t *rdcc_nslots/*out*/, + size_t *rdcc_nbytes/*out*/, + double *rdcc_w0/*out*/); +/** + * \ingroup DAPL + * + * \brief Retrieves the prefix for external raw data storage files as set + * in the dataset access property list + * + * \dapl_id + * \param[in,out] prefix Dataset external storage prefix in UTF-8 or + * ASCII (\em Path and \em filename must be ASCII + * on Windows systems.) + * \param[in] size Size of prefix buffer in bytes + * + * \return Returns the size of \p prefix and the prefix string will be + * stored in \p prefix if successful. + * Otherwise returns a negative value and the contents of \p prefix + * will be undefined. + * + * \details H5Pget_efile_prefix() retrieves the file system path prefix + * for locating external files associated with a dataset that + * uses external storage. This will be the value set with + * H5Pset_efile_prefix() or the HDF5 library’s default. + * + * The value of \p size is the size in bytes of the prefix, + * including the NULL terminator. If the size is unknown, a + * preliminary H5Pget_elink_prefix() call with the pointer + * \p prefix set to NULL will return the size of the prefix + * without the NULL terminator. + * + * The \p prefix buffer must be allocated by the caller. In a + * call that retrieves the actual prefix, that buffer must be + * of the size specified in \p size. + * + * \note See H5Pset_efile_prefix() for a more complete description of + * file location behavior and for notes on the use of the + * HDF5_EXTFILE_PREFIX environment variable. + * + * \since 1.10.0, 1.8.17 + * + */ +H5_DLL ssize_t H5Pget_efile_prefix(hid_t dapl_id, char* prefix /*out*/, size_t size); +/** + * \ingroup DAPL + * + * \brief Retrieves prefix applied to VDS source file paths + * + * \dapl_id + * \param[out] prefix Prefix applied to VDS source file paths + * \param[in] size Size of prefix, including null terminator + * + * \return If successful, returns a non-negative value specifying the size + * in bytes of the prefix without the NULL terminator; otherwise + * returns a negative value. + * + * \details H5Pget_virtual_prefix() retrieves the prefix applied to the + * path of any VDS source files traversed. + * + * When an VDS source file is traversed, the prefix is retrieved + * from the dataset access property list \p dapl_id, returned + * in the user-allocated buffer pointed to by \p prefix, and + * prepended to the filename stored in the VDS virtual file, set + * with H5Pset_virtual(). + * + * The size in bytes of the prefix, including the NULL terminator, + * is specified in \p size. If \p size is unknown, a preliminary + * H5Pget_virtual_prefix() call with the pointer \p prefix set to + * NULL will return the size of the prefix without the NULL + * terminator. + * + * \virtual + * + * \since 1.10.2 + * + */ +H5_DLL ssize_t H5Pget_virtual_prefix(hid_t dapl_id, char* prefix /*out*/, size_t size); +/** + * \ingroup DAPL + * + * \brief Returns the maximum number of missing source files and/or datasets + * with the printf-style names when getting the extent for an unlimited + * virtual dataset + * + * \dapl_id + * \param[out] gap_size Maximum number of the files and/or datasets + * allowed to be missing for determining the extent + * of an unlimited virtual dataset with printf-style + * mappings. (\em Default: 0) + * + * \return \herr_t + * + * \details H5Pget_virtual_printf_gap() returns the maximum number of + * missing printf-style files and/or datasets for determining the + * extent of an unlimited virtual dataaset, \p gap_size, using + * the access property list for the virtual dataset, \p dapl_id. + * + * The default library value for \p gap_size is 0 (zero). + * + * \since 1.10.0 + * + */ +H5_DLL herr_t H5Pget_virtual_printf_gap(hid_t dapl_id, hsize_t *gap_size); +/** + * \ingroup DAPL + * + * \brief Retrieves the view of a virtual dataset accessed with + * \p dapl_id + * + * \dapl_id + * \param[out] view The flag specifying the view of the virtual dataset. + * Valid values are: + * \li #H5D_VDS_FIRST_MISSING + * \li #H5D_VDS_LAST_AVAILABLE + * + * \return \herr_t + * + * \details H5Pget_virtual_view() takes the virtual dataset access property + * list, \p dapl_id, and retrieves the flag, \p view, set by the + * H5Pset_virtual_view() call. + * + * \virtual + * + * \since 1.10.0 + * + */ +H5_DLL herr_t H5Pget_virtual_view(hid_t dapl_id, H5D_vds_view_t *view); +/** + * \ingroup DAPL + * + * \brief Sets two actions to perform when the size of a dataset’s + * dimension being appended reaches a specified boundary + * + * \dapl_id + * \param[in] ndims The number of elements for boundary + * \param[in] boundary The dimension sizes used to determine the boundary + * \param[in] func The user-defined callback function + * \param[in] udata The user-defined input data + * + * \return \herr_t + * + * \details H5Pset_append_flush() sets the following two actions to + * perform for a dataset associated with the dataset access + * property list \p dapl_id: + * + * \li Call the callback function \p func set in the property + * list + * \li Flush the dataset associated with the dataset access + * property list + * + * When a user is appending data to a dataset via H5DOappend() + * and the dataset’s newly extended dimension size hits a + * specified boundary, the library will perform the first action + * listed above. Upon return from the callback function, the + * library will then perform the second action listed above and + * return to the user. If no boundary is hit or set, the two + * actions above are not invoked. + * + * The specified boundary is indicated by the parameter + * \p boundary. It is a 1-dimensional array with \p ndims + * elements, which should be the same as the rank of the + * dataset’s dataspace. While appending to a dataset along a + * particular dimension index via H5DOappend(), the library + * determines a boundary is reached when the resulting dimension + * size is divisible by \p boundary[index]. A zero value for + * \p boundary[index] indicates no boundary is set for that + * dimension index. + * + * The setting of this property will apply only for a chunked + * dataset with an extendible dataspace. A dataspace is extendible + * when it is defined with either one of the following: + * + * \li A dataspace with fixed current and maximum dimension sizes + * \li A dataspace with at least one unlimited dimension for its + * maximum dimension size + * + * When creating or opening a chunked dataset, the library will + * check whether the boundary as specified in the access property + * list is set up properly. The library will fail the dataset + * create or open if the following conditions are true: + * + * \li \p ndims, the number of elements for boundary, is not the + * same as the rank of the dataset’s dataspace. + * \li A non-zero boundary value is specified for a non-extendible + * dimension. + * + * The callback function \p func must conform to the following + * prototype: + * \Code{typedef herr_t (#H5D_append_cb_t)(hid_t dataset_id, + * hsize_t *cur_dims, void *user_data)} + * + * The parameters of the callback function, per the above + * prototype, are defined as follows: + * + * \li \p dataset_id is the dataset identifier. + * \li \p cur_dims is the dataset’s current dimension sizes when + * a boundary is hit. + * \li \p user_data is the user-defined input data. + * + * \todo Example Usage was removed and should be added back. + * \todo Adding snippet for H5D_append_cb_t_snip did not work. + * \todo H5DOappend() not found + * + * \since 1.10.0 + * + */ +H5_DLL herr_t H5Pset_append_flush(hid_t dapl_id, unsigned ndims, + const hsize_t boundary[], H5D_append_cb_t func, void *udata); +/** + * \ingroup DAPL + * + * \brief Sets the raw data chunk cache parameters + * + * \dapl_id + * \param[in] rdcc_nslots The number of chunk slots in the raw data chunk + * cache for this dataset. Increasing this value + * reduces the number of cache collisions, but + * slightly increases the memory used. Due to the + * hashing strategy, this value should ideally be a + * prime number. As a rule of thumb, this value + * should be at least 10 times the number of chunks + * that can fit in \p rdcc_nbytes bytes. For maximum + * performance, this value should be set + * approximately 100 times that number of chunks. + * The default value is 521. If the value passed is + * #H5D_CHUNK_CACHE_NSLOTS_DEFAULT, then the + * property will not be set on \p dapl_id and the + * parameter will come from the file access + * property list used to open the file. + * \param[in] rdcc_nbytes The total size of the raw data chunk cache for + * this dataset. In most cases increasing this + * number will improve performance, as long as + * you have enough free memory. + * The default size is 1 MB. If the value passed is + * #H5D_CHUNK_CACHE_NBYTES_DEFAULT, then the + * property will not be set on \p dapl_id and the + * parameter will come from the file access + * property list. + * \param[in] rdcc_w0 The chunk preemption policy for this dataset. + * This must be between 0 and 1 inclusive and + * indicates the weighting according to which chunks + * which have been fully read or written are + * penalized when determining which chunks to flush + * from cache. A value of 0 means fully read or + * written chunks are treated no differently than + * other chunks (the preemption is strictly LRU) + * while a value of 1 means fully read or written + * chunks are always preempted before other chunks. + * If your application only reads or writes data + * once, this can be safely set to 1. Otherwise, + * this should be set lower, depending on how often + * you re-read or re-write the same data. + * The default value is 0.75. If the value passed is + * #H5D_CHUNK_CACHE_W0_DEFAULT, then the property + * will not be set on \p dapl_id and the parameter + * will come from the file access property list. + * + * \return \herr_t + * + * \details H5Pset_chunk_cache() sets the number of elements, the total + * number of bytes, and the preemption policy value in the raw + * data chunk cache on a dataset access property list. After + * calling this function, the values set in the property list + * will override the values in the file's file access property + * list. + * + * The raw data chunk cache inserts chunks into the cache + * by first computing a hash value using the address of a chunk, + * then using that hash value as the chunk's index into the table + * of cached chunks. The size of this hash table, i.e., and the + * number of possible hash values, is determined by the + * \p rdcc_nslots parameter. If a different chunk in the cache + * has the same hash value, this causes a collision, which + * reduces efficiency. If inserting the chunk into cache would + * cause the cache to be too big, then the cache is pruned + * according to the \p rdcc_w0 parameter. + * + * \note \b Motivation: H5Pset_chunk_cache() is used to adjust the chunk + * cache parameters on a per-dataset basis, as opposed to a global + * setting for the file using H5Pset_cache(). The optimum chunk + * cache parameters may vary widely with different data layout and + * access patterns, so for optimal performance they must be set + * individually for each dataset. It may also be beneficial to + * reduce the size of the chunk cache for datasets whose + * performance is not important in order to save memory space. + * + * \note \b Example \b Usage: The following code sets the chunk cache to + * use a hash table with 12421 elements and a maximum size of + * 16 MB, while using the preemption policy specified for the + * entire file: + * \Code{ + * H5Pset_chunk_cache(dapl_id, 12421, 16*1024*1024, + * H5D_CHUNK_CACHE_W0_DEFAULT);} + * + * \note \b Usage \b Notes: The chunk cache size is a property for + * accessing a dataset and is not stored with a dataset or a + * file. To guarantee the same chunk cache settings each time + * the dataset is opened, call H5Dopen() with a dataset access + * property list where the chunk cache size is set by calling + * H5Pset_chunk_cache() for that property list. The property + * list can be used for multiple accesses in the same + * application. + * + * \note For files where the same chunk cache size will be + * appropriate for all or most datasets, H5Pset_cache() can + * be called with a file access property list to set the + * chunk cache size for accessing all datasets in the file. + * + * \note Both methods can be used in combination, in which case + * the chunk cache size set by H5Pset_cache() will apply + * except for specific datasets where H5Dopen() is called + * with dataset property list with the chunk cache size + * set by H5Pset_chunk_cache(). + * + * \note In the absence of any cache settings, H5Dopen() will + * by default create a 1 MB chunk cache for the opened + * dataset. If this size happens to be appropriate, no + * call will be needed to either function to set the + * chunk cache size. + * + * \note It is also possible that a change in access pattern + * for later access to a dataset will change the + * appropriate chunk cache size. + * + * \since 1.8.3 + * + */ +H5_DLL herr_t H5Pset_chunk_cache(hid_t dapl_id, size_t rdcc_nslots, + size_t rdcc_nbytes, double rdcc_w0); +/** + * \ingroup DAPL + * + * \brief Sets the external dataset storage file prefix in the dataset + * access property list + * + * \dapl_id + * \param[in] prefix Dataset external storage prefix in UTF-8 or ASCII + * (<em>Path and filename must be ASCII on Windows systems.</em>) + * + * \return \herr_t + * + * \details H5Pset_efile_prefix() sets the prefix used to locate raw data + * files for a dataset that uses external storage. This prefix + * can provide either an absolute path or a relative path to the + * external files. + * + * H5Pset_efile_prefix() is used in conjunction with + * H5Pset_external() to control the behavior of the HDF5 library + * when searching for the raw data files associated with a dataset + * that uses external storage: + * + * \li The default behavior of the library is to search for the + * dataset’s external storage raw data files in the same + * directory as the HDF5 file which contains the dataset. + * \li If the prefix is set to an absolute path, the target + * directory will be searched for the dataset’s external + * storage raw data files. + * \li If the prefix is set to a relative path, the target + * directory, relative to the current working directory, will + * be searched for the dataset’s external storage raw data + * files. + * \li If the prefix is set to a relative path that begins with + * the special token ${ORIGIN}, that directory, relative to + * the HDF5 file containing the dataset, will be searched for + * the dataset’s external storage raw data files. + * + * The HDF5_EXTFILE_PREFIX environment variable can be used to + * override the above behavior (the environment variable + * supersedes the API call). Setting the variable to a path + * string and calling H5Dcreate() or H5Dopen() is the equivalent + * of calling H5Pset_efile_prefix() and calling the same create + * or open function. The environment variable is checked at the + * time of the create or open action and copied so it can be + * safely changed after the H5Dcreate() or H5Dopen() call. + * + * Calling H5Pset_efile_prefix() with \p prefix set to NULL or + * the empty string returns the search path to the default. The + * result would be the same as if H5Pset_efile_prefix() had never + * been called. + * + * \note If the external file prefix is not an absolute path and the HDF5 + * file is moved, the external storage files will also need to be + * moved so they can be accessed at the new location. + * + * \note As stated above, the use of the HDF5_EXTFILE_PREFIX environment + * variable overrides any property list setting. + * H5Pset_efile_prefix() and H5Pget_efile_prefix(), being property + * functions, set and retrieve only the property list setting; they + * are unaware of the environment variable. + * + * \note On Windows, the prefix must be an ASCII string since the Windows + * standard C library’s I/O functions cannot handle UTF-8 file names. + * + * \since 1.10.0, 1.8.17 + * + */ +H5_DLL herr_t H5Pset_efile_prefix(hid_t dapl_id, const char* prefix); +/** + * \ingroup DAPL + * + * \brief Sets prefix to be applied to VDS source file paths + * + * \dapl_id + * \param[in] prefix Prefix to be applied to VDS source file paths + * + * \return \herr_t + * + * \details H5Pset_virtual_prefix() sets the prefix to be applied to the + * path of any VDS source files traversed. The prefix is prepended + * to the filename stored in the VDS virtual file, set with + * H5Pset_virtual(). + * + * The prefix is specified in the user-allocated buffer \p prefix + * and set in the dataset access property list \p dapl_id. The + * buffer should not be freed until the property list has been + * closed. + * + * \virtual + * + * \since 1.10.2 + * + */ +H5_DLL herr_t H5Pset_virtual_prefix(hid_t dapl_id, const char* prefix); +/** + * \ingroup DAPL + * + * \brief Sets the maximum number of missing source files and/or datasets + * with the printf-style names when getting the extent of an + * unlimited virtual dataset + * + * \dapl_id + * \param[in] gap_size Maximum number of files and/or datasets allowed to + * be missing for determining the extent of an + * unlimited virtual dataset with printf-style + * mappings (<em>Default value</em>: 0) + * + * \return \herr_t + * + * \details H5Pset_virtual_printf_gap() sets the access property list for + * the virtual dataset, \p dapl_id, to instruct the library to + * stop looking for the mapped data stored in the files and/or + * datasets with the printf-style names after not finding + * \p gap_size files and/or datasets. The found source files and + * datasets will determine the extent of the unlimited virtual + * dataset with the printf-style mappings. + * + * Consider the following examples where the regularly spaced + * blocks of a virtual dataset are mapped to datasets with the + * names d-1, d-2, d-3, ..., d-N, ... : + * + * \li If the dataset d-2 is missing and \p gap_size is set to 0, + * then the virtual dataset will contain only data found + * in d-1. + * \li If d-2 and d-3 are missing and \p gap_size is set to 2, + * then the virtual dataset will contain the data from + * d-1, d-3, ..., d-N, ... . The blocks that are mapped to + * d-2 and d-3 will be filled according to the virtual + * dataset’s fill value setting. + * + * \virtual + * + * \since 1.10.0 + * + */ +H5_DLL herr_t H5Pset_virtual_printf_gap(hid_t dapl_id, hsize_t gap_size); +/** + * \ingroup DAPL + * + * \brief Sets the view of the virtual dataset (VDS) to include or exclude + * missing mapped elements + * + * \dapl_id + * \param[in] view Flag specifying the extent of the data to be included + * in the view. Valid values are: + * \li #H5D_VDS_FIRST_MISSING: View includes all data + * before the first missing mapped data + * \li #H5D_VDS_LAST_AVAILABLE View includes all + * available mapped data + * + * \return \herr_t + * + * \details H5Pset_virtual_view() takes the access property list for the + * virtual dataset, \p dapl_id, and the flag, \p view, and sets + * the VDS view according to the flag value. + * + * If \p view is set to #H5D_VDS_FIRST_MISSING, the view includes + * all data before the first missing mapped data. This setting + * provides a view containing only the continuous data starting + * with the dataset’s first data element. Any break in + * continuity terminates the view. + * + * If \p view is set to #H5D_VDS_LAST_AVAILABLE, the view + * includes all available mapped data. + * + * Missing mapped data is filled with the fill value set in the + * VDS creation property list. + * + * \virtual + * + * \since 1.10.0 + * + */ +H5_DLL herr_t H5Pset_virtual_view(hid_t dapl_id, H5D_vds_view_t view); /* Dataset xfer property list (DXPL) routines */ -H5_DLL herr_t H5Pset_data_transform(hid_t plist_id, const char *expression); -H5_DLL ssize_t H5Pget_data_transform(hid_t plist_id, char *expression /*out*/, size_t size); -H5_DLL herr_t H5Pset_buffer(hid_t plist_id, size_t size, void *tconv, void *bkg); -H5_DLL size_t H5Pget_buffer(hid_t plist_id, void **tconv /*out*/, void **bkg /*out*/); -H5_DLL herr_t H5Pset_preserve(hid_t plist_id, hbool_t status); -H5_DLL int H5Pget_preserve(hid_t plist_id); -H5_DLL herr_t H5Pset_edc_check(hid_t plist_id, H5Z_EDC_t check); +H5_DLL herr_t H5Pget_btree_ratios(hid_t plist_id, double *left/*out*/, + double *middle/*out*/, + double *right/*out*/); +H5_DLL size_t H5Pget_buffer(hid_t plist_id, void **tconv/*out*/, + void **bkg/*out*/); +/** + * + * \ingroup DXPL + * + * \brief Retrieves a data transform expression + * + * \param[in] plist_id Identifier of the property list or class + * \param[out] expression Pointer to memory where the transform expression + * will be copied + * \param[in] size Number of bytes of the transform expression to copy to + * + * \return Returns the size of the transform expression if successful; + * otherwise returns a negative value. + * + * \details H5Pget_data_transform() retrieves the data transform + * expression previously set in the dataset transfer property + * list \p plist_id by H5Pset_data_transform(). + * + * H5Pget_data_transform() can be used to both retrieve the + * transform expression and to query its size. + * + * If \p expression is non-NULL, up to \p size bytes of the data + * transform expression are written to the buffer. If + * \p expression is NULL, \p size is ignored and the function + * does not write anything to the buffer. The function always + * returns the size of the data transform expression. + * + * If 0 is returned for the size of the expression, no data + * transform expression exists for the property list. + * + * If an error occurs, the buffer pointed to by \p expression is + * unchanged and the function returns a negative value. + * + * \since 1.8.0 + * + */ +H5_DLL ssize_t H5Pget_data_transform(hid_t plist_id, char* expression /*out*/, size_t size); H5_DLL H5Z_EDC_t H5Pget_edc_check(hid_t plist_id); -H5_DLL herr_t H5Pset_filter_callback(hid_t plist_id, H5Z_filter_func_t func, void *op_data); -H5_DLL herr_t H5Pset_btree_ratios(hid_t plist_id, double left, double middle, double right); -H5_DLL herr_t H5Pget_btree_ratios(hid_t plist_id, double *left /*out*/, double *middle /*out*/, - double *right /*out*/); -H5_DLL herr_t H5Pset_vlen_mem_manager(hid_t plist_id, H5MM_allocate_t alloc_func, void *alloc_info, - H5MM_free_t free_func, void *free_info); -H5_DLL herr_t H5Pget_vlen_mem_manager(hid_t plist_id, H5MM_allocate_t *alloc_func, void **alloc_info, - H5MM_free_t *free_func, void **free_info); -H5_DLL herr_t H5Pset_hyper_vector_size(hid_t fapl_id, size_t size); -H5_DLL herr_t H5Pget_hyper_vector_size(hid_t fapl_id, size_t *size /*out*/); -H5_DLL herr_t H5Pset_type_conv_cb(hid_t dxpl_id, H5T_conv_except_func_t op, void *operate_data); -H5_DLL herr_t H5Pget_type_conv_cb(hid_t dxpl_id, H5T_conv_except_func_t *op, void **operate_data); +H5_DLL herr_t H5Pget_hyper_vector_size(hid_t fapl_id, size_t *size/*out*/); +H5_DLL int H5Pget_preserve(hid_t plist_id); +H5_DLL herr_t H5Pget_type_conv_cb(hid_t dxpl_id, H5T_conv_except_func_t *op, void** operate_data); +H5_DLL herr_t H5Pget_vlen_mem_manager(hid_t plist_id, + H5MM_allocate_t *alloc_func, + void **alloc_info, + H5MM_free_t *free_func, + void **free_info); +H5_DLL herr_t H5Pset_btree_ratios(hid_t plist_id, double left, double middle, + double right); +H5_DLL herr_t H5Pset_buffer(hid_t plist_id, size_t size, void *tconv, + void *bkg); +/** + * \ingroup DXPL + * + * \brief Sets a data transform expression + * + * \param[in] plist_id Identifier of the property list or class + * \param[in] expression Pointer to the null-terminated data transform + * expression + * + * \return \herr_t + * + * \details H5Pset_data_transform() sets the data transform to be used for + * reading and writing data. This function operates on the dataset + * transfer property list \p plist_id. + * + * The \p expression parameter is a string containing an algebraic + * expression, such as (5/9.0)*(x-32) or x*(x-5). When a dataset + * is read or written with this property list, the transform + * expression is applied with the x being replaced by the values + * in the dataset. When reading data, the values in the file are + * not changed and the transformed data is returned to the user. + * + * Data transforms can only be applied to integer or + * floating-point datasets. Order of operations is obeyed and + * the only supported operations are +, -, *, and /. Parentheses + * can be nested arbitrarily and can be used to change precedence. + * When writing data back to the dataset, the transformed data is + * written to the file and there is no way to recover the original + * values to which the transform was applied. + * + * \since 1.8.0 + * + */ +H5_DLL herr_t H5Pset_data_transform(hid_t plist_id, const char* expression); +H5_DLL herr_t H5Pset_edc_check(hid_t plist_id, H5Z_EDC_t check); +H5_DLL herr_t H5Pset_filter_callback(hid_t plist_id, H5Z_filter_func_t func, + void* op_data); +H5_DLL herr_t H5Pset_hyper_vector_size(hid_t fapl_id, size_t size); +H5_DLL herr_t H5Pset_preserve(hid_t plist_id, hbool_t status); +H5_DLL herr_t H5Pset_type_conv_cb(hid_t dxpl_id, H5T_conv_except_func_t op, void* operate_data); +H5_DLL herr_t H5Pset_vlen_mem_manager(hid_t plist_id, + H5MM_allocate_t alloc_func, + void *alloc_info, H5MM_free_t free_func, + void *free_info); #ifdef H5_HAVE_PARALLEL H5_DLL herr_t H5Pget_mpio_actual_chunk_opt_mode(hid_t plist_id, H5D_mpio_actual_chunk_opt_mode_t *actual_chunk_opt_mode); @@ -1294,17 +5931,16 @@ H5_DLL herr_t H5Pget_mcdt_search_cb(hid_t plist_id, H5O_mcdt_search_cb_t *func, /* Typedefs */ /* Function prototypes */ -H5_DLL herr_t H5Pregister1(hid_t cls_id, const char *name, size_t size, void *def_value, - H5P_prp_create_func_t prp_create, H5P_prp_set_func_t prp_set, - H5P_prp_get_func_t prp_get, H5P_prp_delete_func_t prp_del, - H5P_prp_copy_func_t prp_copy, H5P_prp_close_func_t prp_close); -H5_DLL herr_t H5Pinsert1(hid_t plist_id, const char *name, size_t size, void *value, - H5P_prp_set_func_t prp_set, H5P_prp_get_func_t prp_get, - H5P_prp_delete_func_t prp_delete, H5P_prp_copy_func_t prp_copy, - H5P_prp_close_func_t prp_close); -H5_DLL herr_t H5Pencode1(hid_t plist_id, void *buf, size_t *nalloc); -/** - *------------------------------------------------------------------------- +H5_DLL herr_t H5Pregister1(hid_t cls_id, const char *name, size_t size, void *def_value, + H5P_prp_create_func_t prp_create, H5P_prp_set_func_t prp_set, + H5P_prp_get_func_t prp_get, H5P_prp_delete_func_t prp_del, + H5P_prp_copy_func_t prp_copy, H5P_prp_close_func_t prp_close); +H5_DLL herr_t H5Pinsert1(hid_t plist_id, const char *name, size_t size, void *value, + H5P_prp_set_func_t prp_set, H5P_prp_get_func_t prp_get, + H5P_prp_delete_func_t prp_delete, H5P_prp_copy_func_t prp_copy, + H5P_prp_close_func_t prp_close); +H5_DLL herr_t H5Pencode1(hid_t plist_id, void *buf, size_t *nalloc); +/** * \ingroup OCPL * * \brief Returns information about a filter in a pipeline (DEPRECATED) diff --git a/src/H5Spublic.h b/src/H5Spublic.h index 62e2128..e4163df 100644 --- a/src/H5Spublic.h +++ b/src/H5Spublic.h @@ -120,7 +120,7 @@ typedef enum { extern "C" { #endif -/* Operations on dataspaces and dataspace selections */ +/* Operations on dataspaces, dataspace selections and selection iterators */ /** * \ingroup H5S @@ -143,6 +143,77 @@ 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 1.12.0 + * + */ +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 1.12.0 + * +*/ +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 @@ -171,7 +242,7 @@ H5_DLL herr_t H5Sclose(hid_t space_id); * \since 1.0.0 * */ -H5_DLL hid_t H5Screate(H5S_class_t type); +H5_DLL hid_t H5Screate(H5S_class_t type); /** * \ingroup H5S * \brief Creates a new simple dataspace and opens it for access @@ -182,32 +253,34 @@ H5_DLL hid_t H5Screate(H5S_class_t type); * * \return \hid_t{dataspace} * - * \details H5Screate_simple() creates a new simple dataspace and opens it - * for access, returning a dataspace identifier. + * \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 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. + * \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. + * 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. + * \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. + * 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. + * 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. + * 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. @@ -223,8 +296,304 @@ H5_DLL hid_t H5Screate(H5S_class_t type); * */ H5_DLL hid_t H5Screate_simple(int rank, const hsize_t dims[], const hsize_t maxdims[]); -/*--------------------------------------------------------------------------*/ -/**\ingroup H5S +/** + * \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 New Features + * in HDF5 Release 1.12 as well as the H5Sencode() / H5Sdecode() Format Change RFC. + * + * \todo Fix the references. + * + * \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 * @@ -243,8 +612,47 @@ H5_DLL hid_t H5Screate_simple(int rank, const hsize_t dims[], const hsize_t maxd * */ H5_DLL hssize_t H5Sget_select_npoints(hid_t spaceid); -/*-------------------------------------------------------------------------*/ -/**\ingroup H5S +/** + * \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 * @@ -269,9 +677,10 @@ H5_DLL hssize_t H5Sget_select_npoints(hid_t spaceid); * \since 1.0.0 * */ -H5_DLL int H5Sget_simple_extent_dims(hid_t space_id, hsize_t dims[], hsize_t maxdims[]); -/*-------------------------------------------------------------------------*/ -/**\ingroup H5S +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 * @@ -288,9 +697,391 @@ H5_DLL int H5Sget_simple_extent_dims(hid_t space_id, hsize_t dims[], hsize_t max * */ 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 1.12.0 + * +*/ +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] maxbytes Maximum number of bytes to retrieve in sequences + * \param[out] nseq Number of sequences retrieved + * \param[out] nbytes Number of bytes 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 maxbytes specify the most sequences or bytes + * possible to place into the \p off and \p len arrays. \p nseq and + * \p nbytes return the actual number of sequences and bytes 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 nbytes 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 maxbytes, size_t *nseq, size_t *nbytes, 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 1.12.0 + */ +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 1.12.0 + * + */ +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 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, 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 @@ -393,53 +1184,165 @@ H5_DLL int H5Sget_simple_extent_ndims(hid_t space_id); * \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[]); -H5_DLL herr_t H5Sset_extent_simple(hid_t space_id, int rank, const hsize_t dims[], const hsize_t max[]); -H5_DLL hid_t H5Scopy(hid_t space_id); -H5_DLL herr_t H5Sencode2(hid_t obj_id, void *buf, size_t *nalloc, hid_t fapl); -H5_DLL hid_t H5Sdecode(const void *buf); -H5_DLL hssize_t H5Sget_simple_extent_npoints(hid_t space_id); -H5_DLL htri_t H5Sis_simple(hid_t space_id); -H5_DLL H5S_class_t H5Sget_simple_extent_type(hid_t space_id); -H5_DLL herr_t H5Sset_extent_none(hid_t space_id); -H5_DLL herr_t H5Sextent_copy(hid_t dst_id, hid_t src_id); -H5_DLL htri_t H5Sextent_equal(hid_t sid1, hid_t sid2); - -/* Operations on dataspace selections */ -H5_DLL H5S_sel_type H5Sget_select_type(hid_t spaceid); -H5_DLL herr_t H5Sselect_copy(hid_t dst_id, hid_t src_id); -H5_DLL htri_t H5Sselect_valid(hid_t spaceid); -H5_DLL herr_t H5Sselect_adjust(hid_t spaceid, const hssize_t *offset); -H5_DLL herr_t H5Sget_select_bounds(hid_t spaceid, hsize_t start[], hsize_t end[]); -H5_DLL htri_t H5Sselect_shape_same(hid_t space1_id, hid_t space2_id); -H5_DLL htri_t H5Sselect_intersect_block(hid_t space_id, const hsize_t *start, const hsize_t *end); -H5_DLL herr_t H5Soffset_simple(hid_t space_id, const hssize_t *offset); -H5_DLL herr_t H5Sselect_all(hid_t spaceid); -H5_DLL herr_t H5Sselect_none(hid_t spaceid); -H5_DLL herr_t H5Sselect_elements(hid_t space_id, H5S_seloper_t op, size_t num_elem, const hsize_t *coord); -H5_DLL hssize_t H5Sget_select_elem_npoints(hid_t spaceid); -H5_DLL herr_t H5Sget_select_elem_pointlist(hid_t spaceid, hsize_t startpoint, hsize_t numpoints, - hsize_t buf[/*numpoints*/]); -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[]); -H5_DLL herr_t H5Smodify_select(hid_t space1_id, H5S_seloper_t op, hid_t space2_id); -H5_DLL hid_t H5Scombine_select(hid_t space1_id, H5S_seloper_t op, hid_t space2_id); -H5_DLL htri_t H5Sis_regular_hyperslab(hid_t spaceid); -H5_DLL htri_t H5Sget_regular_hyperslab(hid_t spaceid, hsize_t start[], hsize_t stride[], hsize_t count[], - hsize_t block[]); -H5_DLL hssize_t H5Sget_select_hyper_nblocks(hid_t spaceid); -H5_DLL herr_t H5Sget_select_hyper_blocklist(hid_t spaceid, hsize_t startblock, hsize_t numblocks, - hsize_t buf[/*numblocks*/]); -H5_DLL hid_t H5Sselect_project_intersection(hid_t src_space_id, hid_t dst_space_id, - hid_t src_intersect_space_id); - -/* Operations on dataspace selection iterators */ -H5_DLL hid_t H5Ssel_iter_create(hid_t spaceid, size_t elmt_size, unsigned flags); -H5_DLL herr_t H5Ssel_iter_get_seq_list(hid_t sel_iter_id, size_t maxseq, size_t maxbytes, size_t *nseq, - size_t *nbytes, hsize_t *off, size_t *len); -H5_DLL herr_t H5Ssel_iter_reset(hid_t sel_iter_id, hid_t space_id); -H5_DLL herr_t H5Ssel_iter_close(hid_t sel_iter_id); +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 1.12.0 + * + */ +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 1.12.0 + * + */ +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 1.12.0 + * + */ +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 rank is the dimensionality, or number of dimensions, of the + * dataspace. + * + * \p dims is an array of size \p rank which contains the new size + * of each dimension in the dataspace. \p max is an array of size + * \p rank which 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. + * + * Note that a dataset must be chunked if \p dims does not equal + * \p max. + * + * + * \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. * @@ -447,6 +1350,47 @@ H5_DLL herr_t H5Ssel_iter_close(hid_t sel_iter_id); */ #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 */ |