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$Id: dwarf_hasattr.3 3640 2018-10-14 14:09:13Z jkoshy $
.Dd April 17, 2010 .Dt DWARF_HASATTR 3 .Os .Sh NAME .Nm dwarf_hasattr .Nd check for the presence of an attribute .Sh LIBRARY .Lb libdwarf .Sh SYNOPSIS n libdwarf.h .Ft int .Fo dwarf_hasattr .Fa "Dwarf_Die die" .Fa "Dwarf_Half attr" .Fa "Dwarf_Bool *ret_bool" .Fa "Dwarf_Error *err" .Fc .Sh DESCRIPTION Function .Fn dwarf_hasattr tests whether the debugging information entry referenced in argument .Ar die contains the attribute named by argument .Ar attr . Legal values for argument .Ar attr are those denoted by the .Dv DW_AT_* constants in the DWARF specification.
p If the named attribute is present in the debugging information entry, function .Fn dwarf_hasattr returns a non-zero value in the location pointed to by argument .Ar ret_bool . If the named attribute is not present, a zero is written instead.
p If argument .Ar err is not NULL, it will be used to return an error descriptor in case of an error. .Sh RETURN VALUES On success, function .Fn dwarf_hasattr returns .Dv DW_DLV_OK . In case of an error, it returns .Dv DW_DLV_ERROR and sets argument .Ar err . .Sh ERRORS Function .Fn dwarf_hasattr can fail with the following error: l -tag -width ".Bq Er DW_DLE_ARGUMENT" t Bq Er DW_DLE_ARGUMENT Either of argument .Va die or .Va ret_bool was NULL. .El .Sh SEE ALSO .Xr dwarf 3 , .Xr dwarf_attr 3 , .Xr dwarf_whatattr 3