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FreeBSD 11.0 - man page for dwarf_get_form_class (freebsd section 3)

DWARF_GET_FORM_CLASS(3) 				   BSD Library Functions Manual 				   DWARF_GET_FORM_CLASS(3)

NAME
dwarf_get_form_class -- retrieve the form class of an attribute
LIBRARY
DWARF Access Library (libdwarf, -ldwarf)
SYNOPSIS
#include <libdwarf.h> enum Dwarf_Form_Class dwarf_get_form_class(Dwarf_Half dwversion, Dwarf_Half attr, Dwarf_Half offset_size, Dwarf_Half form);
DESCRIPTION
Function dwarf_get_form_class() returns the class of the form of a DWARF attribute. Argument dwversion should specify the version number of DWARF specification to use: 2 for DWARF2, 3 for DWARF3 and 4 for DWARF4. Argument attr should hold the attribute code of the attribute, i.e., one of the DW_AT_* values defined in <libdwarf.h>. Argument offset_size should hold the size of a DWARF offset for the relevant compilation unit. Argument form should hold the form code of the attribute.
RETURN VALUES
On success, function dwarf_get_form_class() returns the form class code, which is one of the DW_FORM_CLASS_* contants defined in header file <libdwarf.h>. If the function was not able to determine the form class of the attribute, it returns the special form class code DW_FORM_CLASS_UNKNOWN.
ERRORS
Function dwarf_get_form_class() does not return an error.
SEE ALSO
dwarf(3), dwarf_attr(3), dwarf_whatattr(3), dwarf_whatform(3)
BSD
June 26, 2011 BSD