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DWARF_HASFORM(3) FreeBSD Library Functions Manual DWARF_HASFORM(3)
NAME
dwarf_hasform, dwarf_whatform, dwarf_whatform_direct - query attribute
forms
LIBRARY
DWARF Access Library (libdwarf, -ldwarf)
SYNOPSIS
#include <libdwarf.h>
int
dwarf_hasform(Dwarf_Attribute attr, Dwarf_Half form, Dwarf_Bool *ret,
Dwarf_Error *err);
int
dwarf_whatform(Dwarf_Attribute attr, Dwarf_Half *retform,
Dwarf_Error *err);
int
dwarf_whatform_direct(Dwarf_Attribute attr, Dwarf_Half *retform,
Dwarf_Error *err);
DESCRIPTION
Function dwarf_hasform() indicates whether the DWARF attribute denoted by
argument attr has the attribute form specified by argument form. If the
attribute has the specified form, then argument ret is set to a non-zero
value, otherwise it is set to zero. If argument err is non-NULL, it will
be used to return an error descriptor in case of an error.
Function dwarf_whatform() sets the location specified by argument retform
to the attribute form code for the DWARF attribute referenced by argument
attr. If the attribute referenced by argument attr has an indirect form
attribute, this function will return the final form for the attribute.
If argument err is non-NULL, it will be used to return an error
descriptor in case of an error.
Function dwarf_whatform_direct() sets the location specified by argument
retform to the attribute form code for the DWARF attribute referenced by
argument attr. If the form is an indirect form, the function sets the
location specified by argument retform to DW_FORM_indirect. If argument
err is non-NULL, it will be used to return an error descriptor in case of
an error.
RETURN VALUES
These functions return DW_DLV_OK on success. In case of an error, these
functions return DW_DLV_ERR and set argument err.
ERRORS
These functions may fail with the following errors:
[DW_DLE_ARGUMENT] Any of the arguments attr, ret, or retform was NULL.
SEE ALSO
dwarf(3), dwarf_attr(3), dwarf_hasattr(3)
FreeBSD 14.0-RELEASE-p6 May 22, 2010 FreeBSD 14.0-RELEASE-p6