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//===-- DWARFDeclContext.h --------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFDECLCONTEXT_H
#define LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFDECLCONTEXT_H
#include "lldb/Utility/ConstString.h"
#include "DWARFDefines.h"
#include <cassert>
#include <string>
#include <vector>
// DWARFDeclContext
//
// A class that represents a declaration context all the way down to a
// DIE. This is useful when trying to find a DIE in one DWARF to a DIE
// in another DWARF file.
class DWARFDeclContext {
public:
struct Entry {
Entry() = default;
Entry(dw_tag_t t, const char *n) : tag(t), name(n) {}
bool NameMatches(const Entry &rhs) const {
if (name == rhs.name)
return true;
else if (name && rhs.name)
return strcmp(name, rhs.name) == 0;
return false;
}
// Test operator
explicit operator bool() const { return tag != 0; }
dw_tag_t tag = llvm::dwarf::DW_TAG_null;
const char *name = nullptr;
};
DWARFDeclContext() : m_entries() {}
void AppendDeclContext(dw_tag_t tag, const char *name) {
m_entries.push_back(Entry(tag, name));
}
bool operator==(const DWARFDeclContext &rhs) const;
bool operator!=(const DWARFDeclContext &rhs) const { return !(*this == rhs); }
uint32_t GetSize() const { return m_entries.size(); }
Entry &operator[](uint32_t idx) {
assert(idx < m_entries.size() && "invalid index");
return m_entries[idx];
}
const Entry &operator[](uint32_t idx) const {
assert(idx < m_entries.size() && "invalid index");
return m_entries[idx];
}
const char *GetQualifiedName() const;
// Same as GetQualifiedName, but the life time of the returned string will
// be that of the LLDB session.
lldb_private::ConstString GetQualifiedNameAsConstString() const {
return lldb_private::ConstString(GetQualifiedName());
}
void Clear() {
m_entries.clear();
m_qualified_name.clear();
}
protected:
typedef std::vector<Entry> collection;
collection m_entries;
mutable std::string m_qualified_name;
};
#endif // LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFDECLCONTEXT_H
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