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VSfnattrs/vsffnas

int32 VSfnattrs (int32 vdata_id, int32 field_attrs)
vdata_id

IN:

Vdata identifier returned by Vattach

field_attrs

OUT:

Index of the target field

Purpose

Returns the number of attributes attached to the specified vdata field or the number of attributes attached to the vdata identified by vdata_id.

Return value

Returns the number of attributes assigned to this vdata or its fields when successful, and FAIL (or -1) otherwise.

Description

This routine is different from the VSnattrs routine, which returns the number of attributes of the specified vdata and the fields contained in it.

If field_index is set to _HDF_ENTIRE_VDATA, the number of attributes attached to the vdata referred to by the value of vdata_id is returned. When using the Fortran-77 version of this routine, specify a field_index value of -1 to return the number of vdata attributes.

As with VSsetattr, if field_index is set to a zero-based integer value, it will be used as the index of the target vdata field, and the attributes attached to that field will be returned.

FORTRAN

integer function vsffnas(vdata_id, field_index)

integer vdata_id, field_index



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HDF User's Reference Manual, Draft 06/09/97, NCSA HDF Development Group.