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Hdf rm anchor
AnchorNamesummary

Excerpt

Retrieves information about a group, according to the group’s position within an index

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Hdf rm anchor
AnchorNameprocedure

Procedure:
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H5G_GET_INFO_BY_IDX(loc_id, group_name, index_type, order, n, group_info, lapl_id)

Hdf rm anchor
AnchorNamesignature

Signature:
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<pre><code class="language-c">herr_t H5Gget_info_by_idx( hid_t loc_id, const char *group_name, H5_index_t index_type, H5_iter_order_t order, hsize_t n, H5G_info_t *group_info, hid_t lapl_id )</code></pre>
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<pre><code class="language-fortran">SUBROUTINE h5gget_info_by_idx_f(loc_id, group_name, index_type, order, n, &
     storage_type, nlinks, max_corder, hdferr, lapl_id, mounted)

  IMPLICIT NONE
  INTEGER(HID_T), INTENT(IN) :: loc_id     
                               ! File or group identifier
  CHARACTER(LEN=*), INTENT(IN) :: group_name 
                               ! Name of group containing group for which 
                               ! information is to be retrieved
  INTEGER(HID_T), INTENT(IN) :: index_type 
                               ! Index type
  INTEGER(HID_T), INTENT(IN) :: order      
                               ! Order of the count in the index
  INTEGER(HSIZE_T), INTENT(IN) :: n          
                               ! Position in the index of the group for which 
                               ! information is retrieved
  INTEGER, INTENT(OUT) :: storage_type 
                               ! Type of storage for links in group:
                               ! H5G_STORAGE_TYPE_COMPACT_F: Compact storage
                               ! H5G_STORAGE_TYPE_DENSE_F: Indexed storage
                               ! H5G_STORAGE_TYPE_SYMBOL_TABLE_F: Symbol tables
  INTEGER, INTENT(OUT) :: nlinks 
                               ! Number of links in group
  INTEGER, INTENT(OUT) :: max_corder 
                               ! Current maximum creation order value for group
  INTEGER, INTENT(OUT) :: hdferr       
                               ! Error code:
                               ! 0 on success and -1 on failure
  LOGICAL, INTENT(OUT), OPTIONAL :: mounted      
                               ! Whether group has a file mounted on it
END SUBROUTINE h5gget_info_by_idx_f</code></pre>

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AnchorNameparameters

Parameters:
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hid_t loc_idIN: File, group, dataset, named datatype or attribute identifier
const char *group_nameIN: Name of group containing group for which information is to be retrieved
H5_index_t index_typeIN: Index type
H5_iter_order_t orderIN: Order of the count in the index
hsize_t nIN: Position in the index of the group for which information is retrieved
H5G_info_t *group_info    OUT: Struct in which group information is returned
hid_t lapl_idIN: Link access property list

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AnchorNamedescription

Description:
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H5G_GET_INFO_BY_IDX retrieves the same information about a group as retrieved by the function H5G_GET_INFO, but the means of identifying the group differs; the group is identified by position in an index rather than by name.

loc_id and group_name specify the group containing the group for which information is sought. The groups in group_name are indexed by index_type; the group for which information is retrieved is identified in that index by index order, order, and index position, n.

If loc_id specifies the group containing the group for which information is queried, group_name can be a dot (.).

Valid values for index_type are as follows:

H5_INDEX_NAMEAn alpha-numeric index by group name
H5_INDEX_CRT_ORDERAn index by creation order

 

The order in which the index is to be examined, as specified by order, can be one of the following:

H5_ITER_INCThe count is from beginning of the index, i.e., top-down.
H5_ITER_DECThe count is from the end of the index, i.e., bottom-up.
H5_ITER_NATIVEHDF5 counts through the index in the fastest-available order. No information is provided as to the order, but HDF5 ensures that no element in the index will be overlooked.

Hdf rm anchor
AnchorNamereturns

Returns:
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Returns a non-negative value if successful; otherwise returns a negative value. 

Hdf rm anchor
AnchorNameexample

Example:
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branchIdrefs/heads/1.10/master
projectKeyHDFFV
filepathexamples/h5_subset.c
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AnchorNamehistory

History:
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Release    Change
1.8.0Function introduced in this release.