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1 //===- SymbolCategory.h ---------------------------------------------------===//
2 //
3 //                     The MCLinker Project
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 #ifndef MCLD_MC_SYMBOLCATEGORY_H_
10 #define MCLD_MC_SYMBOLCATEGORY_H_
11 #include <cstddef>
12 #include <vector>
13 
14 namespace mcld {
15 
16 class LDSymbol;
17 class ResolveInfo;
18 /** \class SymbolCategory
19  *  \brief SymbolCategory groups output LDSymbol into different categories.
20  */
21 class SymbolCategory {
22  private:
23   typedef std::vector<LDSymbol*> OutputSymbols;
24 
25  public:
26   typedef OutputSymbols::iterator iterator;
27   typedef OutputSymbols::const_iterator const_iterator;
28 
29  public:
30   SymbolCategory();
31 
32   ~SymbolCategory();
33 
34   // -----  modifiers  ----- //
35   SymbolCategory& add(LDSymbol& pSymbol);
36 
37   SymbolCategory& forceLocal(LDSymbol& pSymbol);
38 
39   SymbolCategory& arrange(LDSymbol& pSymbol, const ResolveInfo& pSourceInfo);
40 
41   SymbolCategory& changeCommonsToGlobal();
42 
43   SymbolCategory& changeToDynamic(LDSymbol& pSymbol);
44 
45   // -----  access  ----- //
at(size_t pPosition)46   LDSymbol& at(size_t pPosition) { return *m_OutputSymbols.at(pPosition); }
47 
at(size_t pPosition)48   const LDSymbol& at(size_t pPosition) const {
49     return *m_OutputSymbols.at(pPosition);
50   }
51 
52   LDSymbol& operator[](size_t pPosition) { return *m_OutputSymbols[pPosition]; }
53 
54   const LDSymbol& operator[](size_t pPosition) const {
55     return *m_OutputSymbols[pPosition];
56   }
57 
58   // -----  observers  ----- //
59   size_t numOfSymbols() const;
60 
61   size_t numOfFiles() const;
62 
63   size_t numOfLocals() const;
64 
65   size_t numOfLocalDyns() const;
66 
67   size_t numOfCommons() const;
68 
69   size_t numOfDynamics() const;
70 
71   size_t numOfRegulars() const;
72 
73   bool empty() const;
74 
75   bool emptyFiles() const;
76 
77   bool emptyLocals() const;
78 
79   bool emptyLocalDyns() const;
80 
81   bool emptyCommons() const;
82 
83   bool emptyDynamics() const;
84 
85   bool emptyRegulars() const;
86 
87   // -----  iterators  ----- //
88   iterator begin();
89   iterator end();
90   const_iterator begin() const;
91   const_iterator end() const;
92 
93   iterator fileBegin();
94   iterator fileEnd();
95   const_iterator fileBegin() const;
96   const_iterator fileEnd() const;
97 
98   iterator localBegin();
99   iterator localEnd();
100   const_iterator localBegin() const;
101   const_iterator localEnd() const;
102 
103   iterator localDynBegin();
104   iterator localDynEnd();
105   const_iterator localDynBegin() const;
106   const_iterator localDynEnd() const;
107 
108   iterator commonBegin();
109   iterator commonEnd();
110   const_iterator commonBegin() const;
111   const_iterator commonEnd() const;
112 
113   iterator dynamicBegin();
114   iterator dynamicEnd();
115   const_iterator dynamicBegin() const;
116   const_iterator dynamicEnd() const;
117 
118   iterator regularBegin();
119   iterator regularEnd();
120   const_iterator regularBegin() const;
121   const_iterator regularEnd() const;
122 
123  private:
124   class Category {
125    public:
126     enum Type { File, Local, LocalDyn, Common, Dynamic, Regular };
127 
128    public:
129     Type type;
130 
131     size_t begin;
132     size_t end;
133 
134     Category* prev;
135     Category* next;
136 
137    public:
Category(Type pType)138     explicit Category(Type pType)
139         : type(pType), begin(0), end(0), prev(NULL), next(NULL) {}
140 
size()141     size_t size() const { return (end - begin); }
142 
empty()143     bool empty() const { return (begin == end); }
144 
isFirst()145     bool isFirst() const { return (prev == NULL); }
146 
isLast()147     bool isLast() const { return (next == NULL); }
148 
149     static Type categorize(const ResolveInfo& pInfo);
150   };
151 
152  private:
153   SymbolCategory& add(LDSymbol& pSymbol, Category::Type pTarget);
154 
155   SymbolCategory& arrange(LDSymbol& pSymbol,
156                           Category::Type pSource,
157                           Category::Type pTarget);
158 
159  private:
160   OutputSymbols m_OutputSymbols;
161 
162   Category* m_pFile;
163   Category* m_pLocal;
164   Category* m_pLocalDyn;
165   Category* m_pCommon;
166   Category* m_pDynamic;
167   Category* m_pRegular;
168 };
169 
170 }  // namespace mcld
171 
172 #endif  // MCLD_MC_SYMBOLCATEGORY_H_
173