DIERef.cpp revision 296417 
1//===-- DIERef.cpp ----------------------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "DIERef.h"
11#include "DWARFCompileUnit.h"
12#include "DWARFFormValue.h"
13
14DIERef::DIERef() :
15    cu_offset(DW_INVALID_OFFSET),
16    die_offset(DW_INVALID_OFFSET)
17{}
18
19DIERef::DIERef(dw_offset_t d) :
20    cu_offset(DW_INVALID_OFFSET),
21    die_offset(d)
22{}
23
24DIERef::DIERef(dw_offset_t c, dw_offset_t d) :
25    cu_offset(c),
26    die_offset(d)
27{}
28
29DIERef::DIERef(lldb::user_id_t uid) :
30    cu_offset(uid>>32),
31    die_offset(uid&0xffffffff)
32{}
33
34DIERef::DIERef(const DWARFFormValue& form_value) :
35    cu_offset(DW_INVALID_OFFSET),
36    die_offset(DW_INVALID_OFFSET)
37{
38    if (form_value.IsValid())
39    {
40        const DWARFCompileUnit* dwarf_cu = form_value.GetCompileUnit();
41        if (dwarf_cu)
42        {
43            if (dwarf_cu->GetBaseObjOffset() != DW_INVALID_OFFSET)
44                cu_offset = dwarf_cu->GetBaseObjOffset();
45            else
46                cu_offset = dwarf_cu->GetOffset();
47        }
48        die_offset = form_value.Reference();
49    }
50}
51
52lldb::user_id_t
53DIERef::GetUID() const
54{
55    return ((lldb::user_id_t)cu_offset) << 32 | die_offset;
56}
57