EdkCompatibilityPkg/Other/Maintained/Tools/Pccts/h/ATokPtr.cpp

   1 /* ATokPtr.C
   2  *
   3  * ANTLRToken MUST be defined before entry to this file.
   4  *
   5  * SOFTWARE RIGHTS
   6  *
   7  * We reserve no LEGAL rights to the Purdue Compiler Construction Tool
   8  * Set (PCCTS) -- PCCTS is in the public domain.  An individual or
   9  * company may do whatever they wish with source code distributed with
  10  * PCCTS or the code generated by PCCTS, including the incorporation of
  11  * PCCTS, or its output, into commerical software.
  12  *
  13  * We encourage users to develop software with PCCTS.  However, we do ask
  14  * that credit is given to us for developing PCCTS.  By "credit",
  15  * we mean that if you incorporate our source code into one of your
  16  * programs (commercial product, research project, or otherwise) that you
  17  * acknowledge this fact somewhere in the documentation, research report,
  18  * etc...  If you like PCCTS and have developed a nice tool with the
  19  * output, please mention that you developed it using PCCTS.  In
  20  * addition, we ask that this header remain intact in our source code.
  21  * As long as these guidelines are kept, we expect to continue enhancing
  22  * this system and expect to make other tools available as they are
  23  * completed.
  24  *
  25  * ANTLR 1.33
  26  * Written by Russell Quong June 30, 1995
  27  * Adapted by Terence Parr to ANTLR stuff
  28  * Parr Research Corporation
  29  * with Purdue University and AHPCRC, University of Minnesota
  30  * 1989-1998
  31  */
  32
  33 #include "pcctscfg.h"
  34
  35 PCCTS_NAMESPACE_STD
  36
  37 #include "ATokPtr.h"
  38
  39 void ANTLRTokenPtr::ref() const
  40 {
  41     if (ptr_ != NULL) {
  42                 ptr_->ref();
  43         }
  44 }
  45
  46 void ANTLRTokenPtr::deref()
  47 {
  48     if (ptr_ != NULL)
  49     {
  50                 ptr_->deref();
  51                 if ( ptr_->nref()==0 )
  52                 {
  53                     delete ptr_;
  54                         ptr_ = NULL;
  55                 }
  56     }
  57 }
  58
  59 ANTLRTokenPtr::~ANTLRTokenPtr()
  60 {
  61     deref();
  62 }
  63
  64 //
  65 //  8-Apr-97    MR1     Make operator -> a const member function
  66 //                        as weall as some other member functions
  67 //
  68 void ANTLRTokenPtr::operator = (const ANTLRTokenPtr & lhs)      // MR1
  69 {
  70     lhs.ref();  // protect against "xp = xp"; ie same underlying object
  71     deref();
  72     ptr_ = lhs.ptr_;
  73 }
  74
  75 void ANTLRTokenPtr::operator = (ANTLRAbstractToken *addr)
  76 {
  77     if (addr != NULL) {
  78         addr->ref();
  79     }
  80     deref();
  81     ptr_ = addr;
  82 }