1 //===- FragmentRef.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_LD_FRAGMENT_REFERENCE_H 10 #define MCLD_LD_FRAGMENT_REFERENCE_H 11 #ifdef ENABLE_UNITTEST 12 #include <gtest.h> 13 #endif 14 15 #include <mcld/ADT/SizeTraits.h> 16 #include <mcld/ADT/TypeTraits.h> 17 #include <mcld/LD/Fragment.h> 18 19 namespace mcld 20 { 21 22 class Layout; 23 24 /// compunteFragmentSize - compute the specific Fragment size 25 uint64_t computeFragmentSize(const Layout& pLayout, 26 const Fragment& pFrag); 27 28 /** \class FragmentRef 29 * \brief FragmentRef is a reference of a Fragment's contetnt. 30 * 31 */ 32 class FragmentRef 33 { 34 public: 35 typedef uint64_t Offset; // FIXME: use SizeTraits<T>::Offset 36 typedef NonConstTraits<unsigned char>::pointer Address; 37 typedef ConstTraits<unsigned char>::pointer ConstAddress; 38 39 public: 40 FragmentRef(); 41 FragmentRef(Fragment& pFrag, Offset pOffset = 0); 42 ~FragmentRef(); 43 44 // ----- modifiers ----- // 45 FragmentRef& assign(const FragmentRef& pCopy); 46 47 FragmentRef& assign(Fragment& pFrag, Offset pOffset = 0); 48 49 /// memcpy - copy memory 50 /// copy memory from the fragment to the pDesc. 51 /// @pDest - the destination address 52 /// @pNBytes - copies pNBytes from the fragment[offset()+pOffset] 53 /// @pOffset - additional offset. 54 /// the start address offset from fragment[offset()] 55 void memcpy(void* pDest, size_t pNBytes, Offset pOffset = 0) const; 56 57 // ----- observers ----- // frag()58 Fragment* frag() 59 { return m_pFragment; } 60 frag()61 const Fragment* frag() const 62 { return m_pFragment; } 63 offset()64 Offset offset() const 65 { return m_Offset; } 66 67 // ----- dereference ----- // 68 Address deref(); 69 70 ConstAddress deref() const; 71 72 Address operator*() 73 { return deref(); } 74 75 ConstAddress operator*() const 76 { return deref(); } 77 78 private: 79 Fragment* m_pFragment; 80 Offset m_Offset; 81 }; 82 83 } // namespace of mcld 84 85 #endif 86 87