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[mirror_edk2.git] / Tools / CodeTools / Source / Pccts / h / DLexerBase.cpp

/* DLGLexerBase.c\r
 *\r
 * SOFTWARE RIGHTS\r
 *\r
 * We reserve no LEGAL rights to the Purdue Compiler Construction Tool\r
 * Set (PCCTS) -- PCCTS is in the public domain.  An individual or\r
 * company may do whatever they wish with source code distributed with\r
 * PCCTS or the code generated by PCCTS, including the incorporation of\r
 * PCCTS, or its output, into commerical software.\r
 *\r
 * We encourage users to develop software with PCCTS.  However, we do ask\r
 * that credit is given to us for developing PCCTS.  By "credit",\r
 * we mean that if you incorporate our source code into one of your\r
 * programs (commercial product, research project, or otherwise) that you\r
 * acknowledge this fact somewhere in the documentation, research report,\r
 * etc...  If you like PCCTS and have developed a nice tool with the\r
 * output, please mention that you developed it using PCCTS.  In\r
 * addition, we ask that this header remain intact in our source code.\r
 * As long as these guidelines are kept, we expect to continue enhancing\r
 * this system and expect to make other tools available as they are\r
 * completed.\r
 *\r
 * ANTLR 1.33\r
 * Terence Parr\r
 * Parr Research Corporation\r
 * with Purdue University and AHPCRC, University of Minnesota\r
 * 1989-2000\r
 */\r
\r
#include "pcctscfg.h"\r
\r
#include "pccts_stdio.h"\r
#include "pccts_stdlib.h"\r
\r
PCCTS_NAMESPACE_STD\r
\r
/* I have to put this here due to C++ limitation\r
 * that you can't have a 'forward' decl for enums.\r
 * I hate C++!!!!!!!!!!!!!!!\r
 */\r
\r
// MR1\r
// MR1  10-Apr-97  133MR1  Prevent use of varying sizes for the\r
// MR1  			ANTLRTokenType enum\r
// MR1\r
\r
enum ANTLRTokenType { TER_HATES_CPP=0, ITS_UTTER_GARBAGE,		// MR1\r
					 WITH_SOME_GOOD_IDEAS=9999};	// MR1\r
\r
#define ANTLR_SUPPORT_CODE\r
\r
#include "pcctscfg.h"\r
#include DLEXERBASE_H\r
#include APARSER_H		// MR23\r
\r
DLGLexerBase::\r
DLGLexerBase(DLGInputStream *in,\r
	     unsigned bufsize,\r
	     int _interactive,\r
	     int _track_columns)\r
{\r
	this->_bufsize = bufsize;\r
	this->_lextext = new DLGChar[_bufsize];\r
	if ( this->_lextext==NULL ) {\r
	    panic("text buffer is NULL");\r
	}\r
	this->_begexpr = this->_endexpr = NULL;\r
	this->ch = this->bufovf = 0;\r
	this->nextpos = NULL;\r
	this->cl = 0;\r
	this->add_erase = 0;\r
	this->input = in;\r
	this->_begcol = 0;\r
	this->_endcol = 0;\r
	this->_line = 1;\r
	this->charfull = 0;\r
	this->automaton = 0;\r
	this->token_to_fill = NULL;\r
	this->interactive = _interactive;\r
	this->track_columns = _track_columns;\r
	this->debugLexerFlag = 0;					// MR1\r
	this->parser = NULL;						// MR1\r
    this->lexErrCount=0;                        // MR11\r
}\r
\r
// MR19  THM \r
\r
void DLGLexerBase::reset()\r
{\r
	this->charfull = 0;\r
	this->_begcol = 0;\r
	this->_endcol = 0;\r
	this->automaton = 0;\r
	this->_line=1;\r
	this->lexErrCount=0;\r
}\r
\r
void DLGLexerBase::\r
setInputStream( DLGInputStream *in )\r
{\r
	this->input = in;\r
	_line = 1;\r
	charfull = 0;\r
}\r
\r
/* saves dlg state, but not what feeds dlg (such as file position) */\r
void DLGLexerBase::\r
saveState(DLGState *state)\r
{\r
	state->input = input;\r
	state->interactive = interactive;\r
	state->track_columns = track_columns;\r
	state->auto_num = automaton;\r
	state->add_erase = add_erase;\r
	state->lookc = ch;\r
	state->char_full = charfull;\r
	state->begcol = _begcol;\r
	state->endcol = _endcol;\r
	state->line = _line;\r
	state->lextext = _lextext;\r
	state->begexpr = _begexpr;\r
	state->endexpr = _endexpr;\r
	state->bufsize = _bufsize;\r
	state->bufovf = bufovf;\r
	state->nextpos = nextpos;\r
	state->class_num = cl;\r
	state->debugLexerFlag = debugLexerFlag;				// MR1\r
	state->parser = parser;						// MR1\r
}\r
\r
void DLGLexerBase::\r
restoreState(DLGState *state)\r
{\r
	input = state->input;\r
	interactive = state->interactive;\r
	track_columns = state->track_columns;\r
	automaton = state->auto_num;\r
	add_erase = state->add_erase;\r
	ch = state->lookc;\r
	charfull = state->char_full;\r
	_begcol = state->begcol;\r
	_endcol = state->endcol;\r
	_line = state->line;\r
	_lextext = state->lextext;\r
	_begexpr = state->begexpr;\r
	_endexpr = state->endexpr;\r
	_bufsize = state->bufsize;\r
	bufovf = state->bufovf;\r
	nextpos = state->nextpos;\r
	cl = state->class_num;\r
	debugLexerFlag = state->debugLexerFlag;				// MR1\r
	parser = state->parser;						// MR1\r
}\r
\r
/* erase what is currently in the buffer, and get a new reg. expr */\r
void DLGLexerBase::\r
skip()\r
{\r
	add_erase = 1;\r
}\r
\r
/* don't erase what is in the lextext buffer, add on to it */\r
void DLGLexerBase::\r
more()\r
{\r
	add_erase = 2;\r
}\r
\r
/* substitute c for the reg. expr last matched and is in the buffer */\r
void DLGLexerBase::\r
replchar(DLGChar c)\r
{\r
	/* can't allow overwriting null at end of string */\r
	if (_begexpr < &_lextext[_bufsize-1]){\r
		*_begexpr = c;\r
		*(_begexpr+1) = '\0';\r
	}\r
	_endexpr = _begexpr;\r
	if (c != '\0') {\r
		nextpos = _begexpr + 1;\r
	}\r
	else {\r
		nextpos = _begexpr;	/* MR30 Zero terminates string. */\r
	}\r
}\r
\r
/* replace the string s for the reg. expr last matched and in the buffer */\r
\r
#ifdef _MSC_VER  // MR23\r
//Turn off "assignment within conditional expression" warning\r
#pragma warning(disable : 4706)\r
#endif\r
void DLGLexerBase::\r
replstr(const DLGChar *s) /* MR20 const */\r
{\r
	register DLGChar *l= &_lextext[_bufsize -1];\r
\r
	nextpos = _begexpr;\r
	if (s){\r
		while ((nextpos <= l) && (*(nextpos++) = *(s++))){\r
			/* empty */\r
		}\r
		/* correct for NULL at end of string */\r
		nextpos--;\r
	}\r
	if ((nextpos <= l) && (*(--s) == 0)){\r
		bufovf = 0;\r
	}else{\r
		bufovf = 1;\r
	}\r
	*(nextpos) = '\0';\r
	_endexpr = nextpos - 1;\r
}\r
#ifdef _MSC_VER  // MR23\r
#pragma warning(default: 4706)\r
#endif\r
\r
void DLGLexerBase::\r
errstd(const char *s)                               /* MR20 const */\r
{\r
        lexErrCount++;                              /* MR11 */\r
        /* MR23 */ printMessage(stderr,\r
                "%s near line %d (text was '%s')\n",\r
                ((s == NULL) ? "Lexical error" : s),\r
                _line,_lextext);\r
}\r
\r
int DLGLexerBase::\r
err_in()\r
{\r
	/* MR23 */ printMessage(stderr,"No input stream, function, or string\n");\r
	/* return eof to get out gracefully */\r
	return EOF;\r
}\r
\r
ANTLRTokenType DLGLexerBase::\r
erraction()\r
{\r
	errstd("invalid token");\r
	advance();\r
	skip();\r
	return (ANTLRTokenType) 0;	// bogus, but satisfies compiler\r
}\r
\r
_ANTLRTokenPtr DLGLexerBase::\r
getToken()\r
{\r
	if ( token_to_fill==NULL ) panic("NULL token_to_fill");\r
	ANTLRTokenType tt = nextTokenType();\r
	_ANTLRTokenPtr tk = token_to_fill->makeToken(tt, _lextext,_line);\r
	return tk;\r
}\r
\r
void DLGLexerBase::\r
panic(const char *msg)      /* MR20 const */\r
{\r
	if (parser)				//MR23\r
		parser->panic(msg);	//MR23\r
	else					//MR23\r
	{\r
		/* MR23 */ printMessage(stderr, "DLG panic: %s\n", msg);\r
	//\r
	//  7-Apr-97 133MR1\r
	//\r
		exit(PCCTS_EXIT_FAILURE);					// MR1\r
	}\r
}\r
\r
ANTLRParser * DLGLexerBase::						// MR1\r
setParser(ANTLRParser *p) {						// MR1\r
  ANTLRParser	*oldValue=parser;					// MR1\r
  parser=p;								// MR1\r
  return oldValue;							// MR1\r
}									// MR1\r
									// MR1\r
ANTLRParser * DLGLexerBase::						// MR1\r
getParser() {								// MR1\r
  return parser;							// MR1\r
}									// MR1\r
									// MR1\r
int DLGLexerBase::							// MR1\r
debugLexer(int newValue) {						// MR1\r
  int	oldValue=debugLexerFlag;					// MR1\r
  debugLexerFlag=newValue;						// MR1\r
  return oldValue;							// MR1\r
}									// MR1\r
\r
//MR23\r
int DLGLexerBase::printMessage(FILE* pFile, const char* pFormat, ...)\r
{\r
	va_list marker;\r
	va_start( marker, pFormat );\r
\r
	int iRet = 0;\r
	if (parser)\r
		parser->printMessageV(pFile, pFormat, marker);\r
	else\r
  		iRet = vfprintf(pFile, pFormat, marker);\r
\r
	va_end( marker );\r
	return iRet;\r
}\r