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//===-- HashedNameToDIE.h ---------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef SymbolFileDWARF_HashedNameToDIE_h_
#define SymbolFileDWARF_HashedNameToDIE_h_
#include <vector>
#include "lldb/lldb-defines.h"
#include "lldb/Core/dwarf.h"
class SymbolFileDWARF;
typedef std::vector<dw_offset_t> DIEArray;
class HashedNameToDIE
{
public:
struct Header
{
uint16_t version;
uint8_t hash_type;
uint8_t hash_index_bitsize;
uint32_t num_buckets;
uint32_t num_hashes;
uint32_t die_offset_base;
Header() :
version(0),
hash_type (0),
hash_index_bitsize (0),
num_buckets(0),
num_hashes (0),
die_offset_base(0)
{
}
};
HashedNameToDIE (SymbolFileDWARF *dwarf,
const lldb_private::DataExtractor &data);
~HashedNameToDIE ()
{
}
bool
IsValid () const
{
return m_header.version > 0;
}
uint32_t
GetHashIndexMask () const
{
return (1u << m_header.hash_index_bitsize) - 1u;
}
uint32_t
GetOffsetOfBucketEntry (uint32_t idx) const
{
if (idx < m_header.num_buckets)
return sizeof(Header) + 4 * idx;
return UINT32_MAX;
}
uint32_t
GetOffsetOfHashValue (uint32_t idx) const
{
if (idx < m_header.num_hashes)
return sizeof(Header) +
4 * m_header.num_buckets +
4 * idx;
return UINT32_MAX;
}
uint32_t
GetOffsetOfHashDataOffset (uint32_t idx) const
{
if (idx < m_header.num_hashes)
{
return sizeof(Header) +
4 * m_header.num_buckets +
4 * m_header.num_hashes +
4 * idx;
}
return UINT32_MAX;
}
void
Dump (lldb_private::Stream *s);
size_t
Find (const lldb_private::ConstString &name,
DIEArray &die_ofsets) const;
size_t
Find (const lldb_private::RegularExpression& regex,
DIEArray &die_ofsets) const;
void
Initialize();
protected:
SymbolFileDWARF *m_dwarf;
const lldb_private::DataExtractor &m_data;
Header m_header;
};
#endif // SymbolFileDWARF_HashedNameToDIE_h_
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