lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugArangeSet.h

//===-- DWARFDebugArangeSet.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_DWARFDebugArangeSet_h_
#define SymbolFileDWARF_DWARFDebugArangeSet_h_

#include "SymbolFileDWARF.h"
#include <vector>

class SymbolFileDWARF;

class DWARFDebugArangeSet
{
public:
    struct Header
    {
        uint32_t    length;     // The total length of the entries for that set, not including the length field itself.
        uint16_t    version;    // The DWARF version number
        uint32_t    cu_offset;  // The offset from the beginning of the .debug_info section of the compilation unit entry referenced by the table.
        uint8_t     addr_size;  // The size in bytes of an address on the target architecture. For segmented addressing, this is the size of the offset portion of the address
        uint8_t     seg_size;   // The size in bytes of a segment descriptor on the target architecture. If the target system uses a flat address space, this value is 0.
    };

    struct Descriptor
    {
        dw_addr_t   address;
        dw_addr_t   length;
        dw_addr_t end_address() const { return address + length; }
    };


                    DWARFDebugArangeSet();
        void        Clear();
        void        SetOffset(uint32_t offset) { m_offset = offset; }
        void        SetHeader(uint16_t version, uint32_t cu_offset, uint8_t addr_size, uint8_t seg_size);
        void        AddDescriptor(const DWARFDebugArangeSet::Descriptor& range);
        void        Compact();
        bool        Extract(const lldb_private::DataExtractor &data, uint32_t* offset_ptr);
        void        Dump(lldb_private::Stream *s) const;
        dw_offset_t GetCompileUnitDIEOffset() const { return m_header.cu_offset; }
        dw_offset_t GetOffsetOfNextEntry() const;
        dw_offset_t FindAddress(dw_addr_t address) const;
        uint32_t    NumDescriptors() const { return m_arange_descriptors.size(); }
        const Header&       GetHeader() const { return m_header; }
        const Descriptor*   GetDescriptor(uint32_t i) const
        {
            if (i < m_arange_descriptors.size())
                return &m_arange_descriptors[i];
            return NULL;
        }

        const Descriptor &  
        GetDescriptorRef (uint32_t i) const
        {
            return m_arange_descriptors[i];
        }


protected:
    typedef std::vector<Descriptor>         DescriptorColl;
    typedef DescriptorColl::iterator        DescriptorIter;
    typedef DescriptorColl::const_iterator  DescriptorConstIter;


    uint32_t        m_offset;
    Header          m_header;
    DescriptorColl  m_arange_descriptors;
};

#endif  // SymbolFileDWARF_DWARFDebugArangeSet_h_