1 //===- RPNExpr.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_SCRIPT_RPNEXPR_H 10 #define MCLD_SCRIPT_RPNEXPR_H 11 12 #include <mcld/Support/Allocators.h> 13 #include <mcld/Config/Config.h> 14 #include <mcld/Object/SectionMap.h> 15 #include <vector> 16 17 namespace mcld 18 { 19 20 class ExprToken; 21 class Fragment; 22 23 /** \class RpnExpr 24 * \brief This class defines the interfaces to a rpn expression. 25 */ 26 27 class RpnExpr 28 { 29 public: 30 typedef std::vector<ExprToken*> TokenQueue; 31 typedef TokenQueue::const_iterator const_iterator; 32 typedef TokenQueue::iterator iterator; 33 34 private: 35 friend class Chunk<RpnExpr, MCLD_SYMBOLS_PER_INPUT>; 36 RpnExpr(); 37 38 public: 39 ~RpnExpr(); 40 begin()41 const_iterator begin() const { return m_TokenQueue.begin(); } begin()42 iterator begin() { return m_TokenQueue.begin(); } end()43 const_iterator end() const { return m_TokenQueue.end(); } end()44 iterator end() { return m_TokenQueue.end(); } 45 size()46 size_t size() const { return m_TokenQueue.size(); } 47 empty()48 bool empty() const { return m_TokenQueue.empty(); } 49 50 bool hasDot() const; 51 52 void dump() const; 53 54 void push_back(ExprToken* pToken); 55 56 iterator insert(iterator pPosition, ExprToken* pToken); 57 58 void erase(iterator pPosition); 59 60 /* factory methods */ 61 static RpnExpr* create(); 62 static void destroy(RpnExpr*& pRpnExpr); 63 static void clear(); 64 65 // buildHelperExpr - build the helper expr: 66 // ADDR ( `output_sect' ) + SIZEOF ( `output_sect' ) 67 static RpnExpr* buildHelperExpr(SectionMap::iterator pIter); 68 // buildHelperExpr - build the helper expr: `fragment' 69 static RpnExpr* buildHelperExpr(Fragment& pFrag); 70 71 private: 72 TokenQueue m_TokenQueue; 73 }; 74 75 } // namespace of mcld 76 77 #endif 78 79