/******************************************************************************

 *

 * 

 *

 *

 * Copyright (C) 1997-2008 by Dimitri van Heesch.

 *

 * Permission to use, copy, modify, and distribute this software and its

 * documentation under the terms of the GNU General Public License is hereby 

 * granted. No representations are made about the suitability of this software 

 * for any purpose. It is provided "as is" without express or implied warranty.

 * See the GNU General Public License for more details.

 *

 * Documents produced by Doxygen are derivative works derived from the

 * input used in their production; they are not affected by this license.

 *

 */

%{

#include "constexp.h"  

#include "cppvalue.h"

#include "ce_parse.h" // generated header file

#define YY_NEVER_INTERACTIVE 1

QCString    g_strToken;  

CPPValue    g_resultValue;

int         g_constExpLineNr;

QCString    g_constExpFileName;

static const char *g_inputString;

static int         g_inputPosition;

#undef  YY_INPUT

#define YY_INPUT(buf,result,max_size) result=yyread(buf,max_size);

static int yyread(char *buf,int max_size)

{

  int c=0;

  while( c < max_size && g_inputString[g_inputPosition] )

  {

    *buf = g_inputString[g_inputPosition++] ;

    c++; buf++;

  }

  return c;

}

%}

CONSTSUFFIX ([uU][lL]?[lL]?)|([lL][lL]?[uU]?)

%option nounput

%%

"?"				   { return TOK_QUESTIONMARK; }

":"				   { return TOK_COLON; }

"||"				   { return TOK_OR; }

"&&"				   { return TOK_AND; }

"|"				   { return TOK_BITWISEOR; }

"^"				   { return TOK_BITWISEXOR; }

"&"				   { return TOK_AMPERSAND; }

"!="            		   { return TOK_NOTEQUAL; }

"=="            		   { return TOK_EQUAL; }

"<"             		   { return TOK_LESSTHAN; }

">"             		   { return TOK_GREATERTHAN; }

"<="            		   { return TOK_LESSTHANOREQUALTO; }

">="            		   { return TOK_GREATERTHANOREQUALTO; }

"<<"            		   { return TOK_SHIFTLEFT; }

">>"            		   { return TOK_SHIFTRIGHT; }

"+"             		   { return TOK_PLUS; }

"-"             		   { return TOK_MINUS; }

"*"             		   { return TOK_STAR; }

"/"             		   { return TOK_DIVIDE; }

"%"             		   { return TOK_MOD; }

"~"             		   { return TOK_TILDE; }

"!"             		   { return TOK_NOT; }

"("             		   { return TOK_LPAREN; }

")"             		   { return TOK_RPAREN; }

"'"(([^\'\n\r\\]+)|(\\(([ntvbrfa\\?'\"])|([0-9]+)|([xX][0-9a-fA-F]+))))"'"   { 

                                     g_strToken=yytext;  

				     return TOK_CHARACTER; 

				   }

0[0-7]*{CONSTSUFFIX}?              { g_strToken=yytext; 

  				     return TOK_OCTALINT; 

				   }

[1-9][0-9]*{CONSTSUFFIX}?          { g_strToken=yytext; 

  				     return TOK_DECIMALINT; 

				   }

(0x|0X)[0-9a-fA-F]+{CONSTSUFFIX}?  { g_strToken=yytext+2; 

                                     return TOK_HEXADECIMALINT; 

                                   }

(([0-9]+\.[0-9]*)|([0-9]*\.[0-9]+))([eE]([\-\+])?[0-9]+)?([fFlL])? { 

                                     g_strToken=yytext; return TOK_FLOAT; 

                                   }

([0-9]+[eE])([\-\+])?[0-9]+([fFlL])? { 

                                     g_strToken=yytext; return TOK_FLOAT; 

			           }

.				   

\n

%%

bool parseCppExpression(const char *fileName,int lineNr,const QCString &s)

{

  //printf("Expression: `%s'\n",s.data());

  g_constExpFileName = fileName;

  g_constExpLineNr = lineNr;

  g_inputString = s;

  g_inputPosition = 0;

  cppExpYYrestart( cppExpYYin );

  cppExpYYparse();

  //printf("Result: %ld\n",(long)g_resultValue);

  return (long)g_resultValue!=0;

}

extern "C" {

  int cppExpYYwrap() { return 1; }

}