1 files changed, 73 insertions, 0 deletions
diff --git a/gold/strtab.h b/gold/strtab.h
new file mode 100644
index 0000000..ab22b8f
--- /dev/null
+++ b/gold/strtab.h
@@ -0,0 +1,73 @@
+// 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)