dwarf_get_form_class —
retrieve the form class of an attribute
DWARF Access Library (libdwarf, -ldwarf)
#include
<libdwarf.h>
enum Dwarf_Form_Class
dwarf_get_form_class(
Dwarf_Half
dwversion,
Dwarf_Half attr,
Dwarf_Half offset_size,
Dwarf_Half form);
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.
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
.
Function
dwarf_get_form_class() does not return an
error.
dwarf(3),
dwarf_attr(3),
dwarf_whatattr(3),
dwarf_whatform(3)