Thread: legacy code problem

Hi,

I'm let say stuck with some "legacy" code that i cannot make it to work

example:

Code:

struct noop {
    void operator()(...) const {}
};

void Sweep (const string file){

   int fd;
  if(file.compare("stdin") == 0)
    fd = STDIN_FILENO;
  else
    fd = open(&file[0], O_RDONLY);
  
  char buf[BUFFER_SIZE + 1];

  while(size_t bytes_read = read(fd, buf, BUFFER_SIZE)){ 
    cout << buff;
    // plus some additional complicated functions  that i do not wish to reimplement
   }


}



int main(int argc, char **argv){
  
  string file = SetOptions(argc,argv); // function not shown

  shared_ptr<istream> input;
  int entries = 0, cnt =0;
  char c, t;


  // old  code
   if ( file.compare("-") == 0 || file.compare("") == 0 ){
      Sweep("stdin");
    }else{
      Sweep(file);
    } 


    // new code
    if ( file.compare("-") == 0 || file.compare("") == 0 ){
      input.reset(&cin, noop());
    }else{
      input.reset(new ifstream(file.c_str()));
    }

    entries = 18;

    cout <<(char) (c=(*input).get()) << endl; // this prints a symbol i beliewe  is eof if stdin is chosen.


    while ((c=(*input).get())>0){
      if (c == 'L' && t == '\n')
        cnt++;
      if(cnt > entries)
        break;
      cout << c;
      t = c;
    }
}

Actually it works if i specify the actual file but it does not if I try to cat file directly

Code:

./program -i file   <- works


./program < file   <- not 
�   is what i get

could anyone hint/provide a solution??

thnx

What do you mean by "function not shown"?