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