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//===-- LibCxxInitializerList.cpp -------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "LibCxx.h"
#include "lldb/Core/ConstString.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/DataFormatters/FormattersHelpers.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::formatters;
namespace lldb_private {
namespace formatters {
class LibcxxInitializerListSyntheticFrontEnd : public SyntheticChildrenFrontEnd
{
public:
LibcxxInitializerListSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp);
~LibcxxInitializerListSyntheticFrontEnd() override;
size_t
CalculateNumChildren() override;
lldb::ValueObjectSP
GetChildAtIndex(size_t idx) override;
bool
Update() override;
bool
MightHaveChildren() override;
size_t
GetIndexOfChildWithName(const ConstString &name) override;
private:
ValueObject* m_start;
CompilerType m_element_type;
uint32_t m_element_size;
size_t m_num_elements;
std::map<size_t,lldb::ValueObjectSP> m_children;
};
} // namespace formatters
} // namespace lldb_private
lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd::LibcxxInitializerListSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
SyntheticChildrenFrontEnd(*valobj_sp.get()),
m_start(NULL),
m_element_type(),
m_element_size(0),
m_num_elements(0),
m_children()
{
if (valobj_sp)
Update();
}
lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd::~LibcxxInitializerListSyntheticFrontEnd()
{
// this needs to stay around because it's a child object who will follow its parent's life cycle
// delete m_start;
}
size_t
lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd::CalculateNumChildren ()
{
static ConstString g___size_("__size_");
m_num_elements = 0;
ValueObjectSP size_sp(m_backend.GetChildMemberWithName(g___size_, true));
if (size_sp)
m_num_elements = size_sp->GetValueAsUnsigned(0);
return m_num_elements;
}
lldb::ValueObjectSP
lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd::GetChildAtIndex (size_t idx)
{
if (!m_start)
return lldb::ValueObjectSP();
auto cached = m_children.find(idx);
if (cached != m_children.end())
return cached->second;
uint64_t offset = idx * m_element_size;
offset = offset + m_start->GetValueAsUnsigned(0);
StreamString name;
name.Printf("[%" PRIu64 "]", (uint64_t)idx);
ValueObjectSP child_sp = CreateValueObjectFromAddress(name.GetData(), offset, m_backend.GetExecutionContextRef(), m_element_type);
m_children[idx] = child_sp;
return child_sp;
}
bool
lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd::Update()
{
static ConstString g___begin_("__begin_");
m_start = nullptr;
m_num_elements = 0;
m_children.clear();
lldb::TemplateArgumentKind kind;
m_element_type = m_backend.GetCompilerType().GetTemplateArgument(0, kind);
if (kind != lldb::eTemplateArgumentKindType || false == m_element_type.IsValid())
return false;
m_element_size = m_element_type.GetByteSize(nullptr);
if (m_element_size > 0)
m_start = m_backend.GetChildMemberWithName(g___begin_,true).get(); // store raw pointers or end up with a circular dependency
return false;
}
bool
lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd::MightHaveChildren ()
{
return true;
}
size_t
lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
{
if (!m_start)
return UINT32_MAX;
return ExtractIndexFromString(name.GetCString());
}
lldb_private::SyntheticChildrenFrontEnd*
lldb_private::formatters::LibcxxInitializerListSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
{
if (!valobj_sp)
return NULL;
return (new LibcxxInitializerListSyntheticFrontEnd(valobj_sp));
}
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