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74 lines
1.4 KiB
C
74 lines
1.4 KiB
C
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// strtab.h -- manage an ELF string table for gold -*- C++ -*-
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#ifndef GOLD_STRTAB_H
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#define GOLD_STRTAB_H
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#include <cstring>
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#include <string>
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namespace gold
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{
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// This class holds an ELF string table. We keep a reference count
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// for each string, which we use to determine which strings are
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// actually required at the end. When all operations are done, the
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// string table is finalized, which sets the offsets to use for each
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// string.
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class Strtab
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{
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public:
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Strtab();
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~Strtab();
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Strtab_ref* add(const char*);
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Strtab_ref* add(const std::string& s)
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{ return this->add(s.c_str()); }
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private:
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Strtab(const Strtab&);
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Strtab& operator=(const Strtab&);
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struct strtab_hash
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{
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std::size_t
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operator()(const char*p);
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};
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struct strtab_eq
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{
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bool
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operator()(const char* p1, const char* p2)
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{ return strcmp(p1, p2) == 0; }
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};
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Unordered_map<const char*, Strtab_ref*, strtab_hash, strtab_eq,
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std::allocator<std::pair<const char* const, Strtab_ref*> >,
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true> strings_;
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};
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// Users of Strtab work with pointers to Strtab_ref structures. These
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// are allocated via new and should be deleted if the string is no
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// longer needed.
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class Strtab_ref
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{
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public:
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~Strtab_ref();
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const char*
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str() const;
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private:
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Strtab_ref(const Strtab_ref&);
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Strtab_ref& operator=(const Strtab_ref&);
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int refs_;
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};
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} // End namespace gold.
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#endif // !defined(GOLD_STRTAB_H)
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