1//===-- DWARFFormValue.h ----------------------------------------*- 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#ifndef SymbolFileDWARF_DWARFFormValue_h_
11#define SymbolFileDWARF_DWARFFormValue_h_
12
13#include <stddef.h> // for NULL
14
15class DWARFCompileUnit;
16
17class DWARFFormValue
18{
19public:
20    typedef struct ValueTypeTag
21    {
22        ValueTypeTag() :
23            value(),
24            data(NULL)
25        {
26            value.uval = 0;
27        }
28
29        union
30        {
31            uint64_t uval;
32            int64_t sval;
33            const char* cstr;
34        } value;
35        const uint8_t* data;
36    } ValueType;
37
38    enum
39    {
40        eValueTypeInvalid = 0,
41        eValueTypeUnsigned,
42        eValueTypeSigned,
43        eValueTypeCStr,
44        eValueTypeBlock
45    };
46
47    DWARFFormValue(dw_form_t form = 0);
48    dw_form_t           Form()  const { return m_form; }
49    void                SetForm(dw_form_t form) { m_form = form; }
50    const ValueType&    Value() const { return m_value; }
51    void                Dump(lldb_private::Stream &s, const lldb_private::DataExtractor* debug_str_data, const DWARFCompileUnit* cu) const;
52    bool                ExtractValue(const lldb_private::DataExtractor& data,
53                                     lldb::offset_t* offset_ptr,
54                                     const DWARFCompileUnit* cu);
55    bool                IsInlinedCStr() const { return (m_value.data != NULL) && m_value.data == (uint8_t*)m_value.value.cstr; }
56    const uint8_t*      BlockData() const;
57    uint64_t            Reference(const DWARFCompileUnit* cu) const;
58    uint64_t            Reference (dw_offset_t offset) const;
59    bool                ResolveCompileUnitReferences(const DWARFCompileUnit* cu);
60    bool                Boolean() const { return m_value.value.uval != 0; }
61    uint64_t            Unsigned() const { return m_value.value.uval; }
62    void                SetUnsigned(uint64_t uval) { m_value.value.uval = uval; }
63    int64_t             Signed() const { return m_value.value.sval; }
64    void                SetSigned(int64_t sval) { m_value.value.sval = sval; }
65    const char*         AsCString(const lldb_private::DataExtractor* debug_str_data_ptr) const;
66    bool                SkipValue(const lldb_private::DataExtractor& debug_info_data, lldb::offset_t *offset_ptr, const DWARFCompileUnit* cu) const;
67    static bool         SkipValue(const dw_form_t form, const lldb_private::DataExtractor& debug_info_data, lldb::offset_t *offset_ptr, const DWARFCompileUnit* cu);
68//  static bool         TransferValue(dw_form_t form, const lldb_private::DataExtractor& debug_info_data, lldb::offset_t *offset_ptr, const DWARFCompileUnit* cu, BinaryStreamBuf& out_buff);
69//  static bool         TransferValue(const DWARFFormValue& formValue, const DWARFCompileUnit* cu, BinaryStreamBuf& out_buff);
70//  static bool         PutUnsigned(dw_form_t form, dw_offset_t offset, uint64_t value, BinaryStreamBuf& out_buff, const DWARFCompileUnit* cu, bool fixup_cu_relative_refs);
71    static bool         IsBlockForm(const dw_form_t form);
72    static bool         IsDataForm(const dw_form_t form);
73    static const uint8_t * GetFixedFormSizesForAddressSize (uint8_t addr_size);
74    static int          Compare (const DWARFFormValue& a, const DWARFFormValue& b, const DWARFCompileUnit* a_cu, const DWARFCompileUnit* b_cu, const lldb_private::DataExtractor* debug_str_data_ptr);
75protected:
76    dw_form_t   m_form;     // Form for this value
77    ValueType   m_value;    // Contains all data for the form
78};
79
80
81#endif  // SymbolFileDWARF_DWARFFormValue_h_
82