1//===-- DWARFDeclContext.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 "DWARFDeclContext.h"
11
12const char *
13DWARFDeclContext::GetQualifiedName () const
14{
15    if (m_qualified_name.empty())
16    {
17        // The declaration context array for a class named "foo" in namespace
18        // "a::b::c" will be something like:
19        //  [0] DW_TAG_class_type "foo"
20        //  [1] DW_TAG_namespace "c"
21        //  [2] DW_TAG_namespace "b"
22        //  [3] DW_TAG_namespace "a"
23        if (!m_entries.empty())
24        {
25            if (m_entries.size() == 1)
26            {
27                if (m_entries[0].name)
28                {
29                    m_qualified_name.append("::");
30                    m_qualified_name.append(m_entries[0].name);
31                }
32            }
33            else
34            {
35                collection::const_reverse_iterator pos;
36                collection::const_reverse_iterator begin = m_entries.rbegin();
37                collection::const_reverse_iterator end = m_entries.rend();
38                for (pos = begin; pos != end; ++pos)
39                {
40                    if (pos != begin)
41                        m_qualified_name.append("::");
42                    if (pos->name == NULL)
43                    {
44                        if (pos->tag == DW_TAG_namespace)
45                            m_qualified_name.append ("(anonymous namespace)");
46                        else if (pos->tag == DW_TAG_class_type)
47                            m_qualified_name.append ("(anonymous class)");
48                        else if (pos->tag == DW_TAG_structure_type)
49                            m_qualified_name.append ("(anonymous struct)");
50                        else if (pos->tag == DW_TAG_union_type)
51                            m_qualified_name.append ("(anonymous union)");
52                        else
53                            m_qualified_name.append ("(anonymous)");
54                    }
55                    else
56                        m_qualified_name.append(pos->name);
57                }
58            }
59        }
60    }
61    if (m_qualified_name.empty())
62        return NULL;
63    return m_qualified_name.c_str();
64}
65
66
67bool
68DWARFDeclContext::operator==(const DWARFDeclContext& rhs) const
69{
70    if (m_entries.size() != rhs.m_entries.size())
71        return false;
72
73    collection::const_iterator pos;
74    collection::const_iterator begin = m_entries.begin();
75    collection::const_iterator end = m_entries.end();
76
77    collection::const_iterator rhs_pos;
78    collection::const_iterator rhs_begin = rhs.m_entries.begin();
79    // The two entry arrays have the same size
80
81    // First compare the tags before we do expensize name compares
82    for (pos = begin, rhs_pos = rhs_begin; pos != end; ++pos, ++rhs_pos)
83    {
84        if (pos->tag != rhs_pos->tag)
85        {
86            // Check for DW_TAG_structure_type and DW_TAG_class_type as they are often
87            // used interchangeably in GCC
88            if (pos->tag == DW_TAG_structure_type && rhs_pos->tag == DW_TAG_class_type)
89                continue;
90            if (pos->tag == DW_TAG_class_type && rhs_pos->tag == DW_TAG_structure_type)
91                continue;
92            return false;
93        }
94    }
95    // The tags all match, now compare the names
96    for (pos = begin, rhs_pos = rhs_begin; pos != end; ++pos, ++rhs_pos)
97    {
98        if (!pos->NameMatches (*rhs_pos))
99            return false;
100    }
101    // All tags and names match
102    return true;
103}
104
105