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AToken.h

/* ANTLRToken.h
 *
 * SOFTWARE RIGHTS
 *
 * We reserve no LEGAL rights to the Purdue Compiler Construction Tool
 * Set (PCCTS) -- PCCTS is in the public domain.  An individual or
 * company may do whatever they wish with source code distributed with
 * PCCTS or the code generated by PCCTS, including the incorporation of
 * PCCTS, or its output, into commerical software.
 *
 * We encourage users to develop software with PCCTS.  However, we do ask
 * that credit is given to us for developing PCCTS.  By "credit",
 * we mean that if you incorporate our source code into one of your
 * programs (commercial product, research project, or otherwise) that you
 * acknowledge this fact somewhere in the documentation, research report,
 * etc...  If you like PCCTS and have developed a nice tool with the
 * output, please mention that you developed it using PCCTS.  In
 * addition, we ask that this header remain intact in our source code.
 * As long as these guidelines are kept, we expect to continue enhancing
 * this system and expect to make other tools available as they are
 * completed.
 *
 * ANTLR 1.33
 * Terence Parr
 * Parr Research Corporation
 * with Purdue University and AHPCRC, University of Minnesota
 * 1989-1998
 */

#ifndef ATOKEN_H_GATE
#define ATOKEN_H_GATE

#include "pcctscfg.h"

#include "pccts_string.h"
#include "pccts_stdio.h"
#include "pccts_stdlib.h"

PCCTS_NAMESPACE_STD

// MR9      RJV (JVincent@novell.com) Not needed for variable length strings

//// MR9 #ifndef ANTLRCommonTokenTEXTSIZE
//// MR9 #define ANTLRCommonTokenTEXTSIZE             100
//// MR9 #endif


/* must define what a char looks like; can make this a class too */
typedef char ANTLRChar;

/* D E F I N E  S M A R T  P O I N T E R S */

//#include ATOKPTR_H   not tested yet, leave out
class ANTLRAbstractToken;
typedef ANTLRAbstractToken *_ANTLRTokenPtr;

class ANTLRAbstractToken {
public:
    virtual ~ANTLRAbstractToken() {;}
    virtual ANTLRTokenType getType() const = 0;
    virtual void setType(ANTLRTokenType t) = 0;
    virtual int getLine() const = 0;
    virtual void setLine(int line) = 0;
    virtual ANTLRChar *getText() const = 0;
    virtual void setText(const ANTLRChar *) = 0;

    /* This function will disappear when I can use templates */
      virtual ANTLRAbstractToken *makeToken(ANTLRTokenType tt,
                                                              ANTLRChar *text,
                                                              int line) = 0;

      /* define to satisfy ANTLRTokenBuffer's need to determine whether or
         not a token object can be destroyed.  If nref()==0, no one has
         a reference, and the object may be destroyed.  This function defaults
         to 1, hence, if you use deleteTokens() message with a token object
         not derived from ANTLRCommonRefCountToken, the parser will compile
         but will not delete objects after they leave the token buffer.
    */

      virtual unsigned nref() const { return 1; }     // MR11
      virtual void ref() {;}
      virtual void deref() {;}

      virtual void panic(const char *msg)             // MR20 const
            {
                  fprintf(stderr, "ANTLRAbstractToken panic: %s\n", msg);
                  exit(PCCTS_EXIT_FAILURE);
            }
};

/* This class should be subclassed.  It cannot store token type or text */

class ANTLRRefCountToken : public ANTLRAbstractToken {
public:
#ifdef DBG_REFCOUNTTOKEN
      static int ctor;
      static int dtor;
#endif
protected:
    unsigned refcnt_;
#ifdef DBG_REFCOUNTTOKEN
      char object[200];
#endif

public:
      ANTLRRefCountToken(ANTLRTokenType t, const ANTLRChar *s)
#ifndef DBG_REFCOUNTTOKEN
            {
                  refcnt_ = 0;
            }
#else
      {
            ctor++;
            refcnt_ = 0;
            if ( t==1 ) sprintf(object,"tok_EOF");
            else sprintf(object,"tok_%s",s);
            fprintf(stderr, "ctor %s #%d\n",object,ctor);
      }
#endif
      ANTLRRefCountToken()
#ifndef DBG_REFCOUNTTOKEN
            { refcnt_ = 0; }
#else
            {
                  ctor++;
                  refcnt_ = 0;
                  sprintf(object,"tok_blank");
                  fprintf(stderr, "ctor %s #%d\n",object,ctor);
            }
      virtual ~ANTLRRefCountToken()
            {
                  dtor++;
                  if ( dtor>ctor ) fprintf(stderr, "WARNING: dtor>ctor\n");
                  fprintf(stderr, "dtor %s #%d\n", object, dtor);
                  object[0]='\0';
            }
#endif

      // reference counting stuff needed by ANTLRTokenPtr.
      // User should not access these; for C++ language reasons, we had
      // to make these public.  Yuck.

      void ref()              { refcnt_++; }
      void deref()            { refcnt_--; }
      unsigned nref()   const { return refcnt_; }   // MR11

      virtual ANTLRAbstractToken *makeToken(ANTLRTokenType tt,
                                                              ANTLRChar *txt,
                                                              int line)
      {
            panic("call to ANTLRRefCountToken::makeToken()\n");
            return NULL;
      }
};

class ANTLRCommonNoRefCountToken : public ANTLRAbstractToken {
protected:
      ANTLRTokenType _type;
      int _line;
      ANTLRChar *_text;               // MR9 RJV

public:
      ANTLRCommonNoRefCountToken(ANTLRTokenType t, const ANTLRChar *s)
      { setType(t); _line = 0; _text = NULL; setText(s); }
      ANTLRCommonNoRefCountToken()
      { setType((ANTLRTokenType)0); _line = 0; _text = NULL; setText(""); }

      ~ANTLRCommonNoRefCountToken() { if (_text) delete [] _text; }  // MR9 RJV: Added Destructor to remove string

      ANTLRTokenType getType() const      { return _type; }
      void setType(ANTLRTokenType t)      { _type = t; }
      virtual int getLine() const         { return _line; }
      void setLine(int line)        { _line = line; }
      ANTLRChar *getText() const    { return _text; }
    int getLength() const           { return strlen(getText()); }       // MR11

// MR9 RJV: Added code for variable length strings to setText()

      void setText(const ANTLRChar *s)
      {     if (s != _text) {
          if (_text) delete [] _text;
          if (s != NULL) {
            _text = new ANTLRChar[strlen(s)+1];
            if (_text == NULL) panic("ANTLRCommonNoRefCountToken::setText new failed");
            strcpy(_text,s);
        } else {
            _text = new ANTLRChar[1];
            if (_text == NULL) panic("ANTLRCommonNoRefCountToken::setText new failed");
            strcpy(_text,"");
          };
        };
      }

      virtual ANTLRAbstractToken *makeToken(ANTLRTokenType tt,
                                                              ANTLRChar *txt,
                                                              int line)
            {
                  ANTLRAbstractToken *t = new ANTLRCommonNoRefCountToken;
                  t->setType(tt); t->setText(txt); t->setLine(line);
                  return t;
            }

// MR9 THM Copy constructor required when heap allocated string is used with copy semantics

   ANTLRCommonNoRefCountToken (const ANTLRCommonNoRefCountToken& from) :
         ANTLRAbstractToken(from) {
       setType(from._type);
       setLine(from._line);
     _text=NULL;
     setText(from._text);
  };

// MR9 THM operator =() required when heap allocated string is used with copy semantics

   virtual ANTLRCommonNoRefCountToken& operator =(const ANTLRCommonNoRefCountToken& rhs) {

//////  MR15 WatCom can't hack use of operator =()
//////  Use this:  *( (ANTRLAbstractToken *) this)=rhs;

     *( (ANTLRAbstractToken *) this ) = rhs;

       setType(rhs._type);
       setLine(rhs._line);
     setText(rhs._text);
     return *this;
   };
};

class ANTLRCommonToken : public ANTLRRefCountToken {
protected:
      ANTLRTokenType       _type;
      int                  _line;
      ANTLRChar           *_text;               // MR9 RJV:Added

public:
      ANTLRCommonToken(ANTLRTokenType t, const ANTLRChar *s) : ANTLRRefCountToken(t,s)
            { setType(t); _line = 0; _text = NULL; setText(s); }                    // MR9
      ANTLRCommonToken()
            { setType((ANTLRTokenType)0); _line = 0; _text = NULL; setText(""); }   // MR9

      virtual ~ANTLRCommonToken() { if (_text) delete [] _text; } // MR9 RJV: Added Destructor to remove string

      ANTLRTokenType getType() const      { return _type; }
      void setType(ANTLRTokenType t)      { _type = t; }
      virtual int getLine() const         { return _line; }
      void setLine(int line)        { _line = line; }
      ANTLRChar *getText() const          { return _text; }
    int getLength() const           { return strlen(getText()); }       // MR11

// MR9 RJV: Added code for variable length strings to setText()

      void setText(const ANTLRChar *s)
      {     if (s != _text) {
          if (_text) delete [] _text;
          if (s != NULL) {
            _text = new ANTLRChar[strlen(s)+1];
            if (_text == NULL) panic("ANTLRCommonToken::setText new failed");
            strcpy(_text,s);
        } else {
            _text = new ANTLRChar[1];
            if (_text == NULL) panic("ANTLRCommonToken::setText new failed");
            strcpy(_text,"");
          };
        };
      }

      virtual ANTLRAbstractToken *makeToken(ANTLRTokenType tt,
                                                              ANTLRChar *txt,
                                                              int line)
      {
            ANTLRAbstractToken *t = new ANTLRCommonToken(tt,txt);
            t->setLine(line);
            return t;
      }

// MR9 THM Copy constructor required when heap allocated string is used with copy semantics

   ANTLRCommonToken (const ANTLRCommonToken& from) :
         ANTLRRefCountToken(from) {
       setType(from._type);
       setLine(from._line);
     _text=NULL;
     setText(from._text);
  };

// MR9 THM operator =() required when heap allocated string is used with copy semantics

   virtual ANTLRCommonToken& operator =(const ANTLRCommonToken& rhs) {

//////  MR15 WatCom can't hack use of operator =()
//////  Use this instead:   *( (ANTRLRRefCountToken *) this)=rhs;

     *( (ANTLRRefCountToken *) this) = rhs;

       setType(rhs._type);
       setLine(rhs._line);
     setText(rhs._text);
     return *this;
   };
};

// used for backward compatibility
typedef ANTLRCommonToken ANTLRCommonBacktrackingToken;

#endif

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