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  1. //===- StringTable.h --------------------------------------------*- C++ -*-===//
  2. //
  3. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4. // See https://llvm.org/LICENSE.txt for license information.
  5. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8.  
  9. #ifndef LLVM_DEBUGINFO_GSYM_STRINGTABLE_H
  10. #define LLVM_DEBUGINFO_GSYM_STRINGTABLE_H
  11.  
  12. #include "llvm/ADT/StringRef.h"
  13. #include "llvm/DebugInfo/GSYM/ExtractRanges.h"
  14. #include <stdint.h>
  15.  
  16. namespace llvm {
  17. namespace gsym {
  18.  
  19. /// String tables in GSYM files are required to start with an empty
  20. /// string at offset zero. Strings must be UTF8 NULL terminated strings.
  21. struct StringTable {
  22.   StringRef Data;
  23.   StringTable() = default;
  24.   StringTable(StringRef D) : Data(D) {}
  25.   StringRef operator[](size_t Offset) const { return getString(Offset); }
  26.   StringRef getString(uint32_t Offset) const {
  27.     if (Offset < Data.size()) {
  28.       auto End = Data.find('\0', Offset);
  29.       return Data.substr(Offset, End - Offset);
  30.     }
  31.     return StringRef();
  32.   }
  33.   void clear() { Data = StringRef(); }
  34. };
  35.  
  36. inline raw_ostream &operator<<(raw_ostream &OS, const StringTable &S) {
  37.   OS << "String table:\n";
  38.   uint32_t Offset = 0;
  39.   const size_t Size = S.Data.size();
  40.   while (Offset < Size) {
  41.     StringRef Str = S.getString(Offset);
  42.     OS << HEX32(Offset) << ": \"" << Str << "\"\n";
  43.     Offset += Str.size() + 1;
  44.   }
  45.   return OS;
  46. }
  47.  
  48. } // namespace gsym
  49. } // namespace llvm
  50. #endif // LLVM_DEBUGINFO_GSYM_STRINGTABLE_H
  51.