Problem in Input from File and Buffer

[banda bindas]

Hi,
   I am having problem with Flex/Bison in getting input. I am designing an application which will take input from File and from Buffer(at diferent instances). To read the buffer, I defined a class like this

public:
 LexChild(){}
 void lexRestart(YY_Lexer_IFILE *input_file ){ yyrestart(input_file);}
 void lex_switch_to_buffer( ){
  if(YY_CURRENT_BUFFER)
  {
   yy_delete_buffer(YY_CURRENT_BUFFER);
  }

  yy_switch_to_buffer( yy_create_buffer( NULL, YY_BUF_SIZE) );
 }

};

Parser has two different functions for working in two conditions..in case of buffer and in case of File.

Now, I am not able to parse through file, although the buffer part works just fine. I was able to parse the file before adding the buffer part..

Please help in this regard.

Thanking you all,
praveen

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