AToken.h
资源名称:pccts133.zip [点击查看]
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上传日期:2007-01-06
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- /* 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(char *msg)
- {
- fprintf(stderr, "ANTLRAbstractToken panic: %sn", 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 #%dn",object,ctor);
- }
- #endif
- ANTLRRefCountToken()
- #ifndef DBG_REFCOUNTTOKEN
- { refcnt_ = 0; }
- #else
- {
- ctor++;
- refcnt_ = 0;
- sprintf(object,"tok_blank");
- fprintf(stderr, "ctor %s #%dn",object,ctor);
- }
- virtual ~ANTLRRefCountToken()
- {
- dtor++;
- if ( dtor>ctor ) fprintf(stderr, "WARNING: dtor>ctorn");
- fprintf(stderr, "dtor %s #%dn", object, dtor);
- object[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) {
- this->ANTLRAbstractToken::operator=(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) {
- this->ANTLRRefCountToken::operator=(rhs);
- setType(rhs._type);
- setLine(rhs._line);
- setText(rhs._text);
- return *this;
- };
- };
- // used for backward compatibility
- typedef ANTLRCommonToken ANTLRCommonBacktrackingToken;
- #endif