/////////////////////////////////////////////////////////////////////
//  display.cpp - generates formatted strings from semiExp objects //
//  ver 1.4                                                        //
//                                                                 //
//  Language:     Visual C++, ver 7.0                              //
//  Platfrom:     Dell Dimension 8100, Windows 2000, SP 2.0        //
//  Application:  Prototype for CSE687 Pr#2, Spring 2003           //
//  Author:       Jim Fawcett, CST 2-187, Syracuse University      //
//                (315) 443-3948, jfawcett@twcny.rr.com            //
/////////////////////////////////////////////////////////////////////

#include "display.h"
using namespace Scanner;
using namespace CodeAnal;

//----< pull class::name from CSemiExp >------------------------

std::string display::functionName(CSemiExp &se)
{
  size_t last = se.find("(") - 1;
  if(last == se.length()) return "error in display::functionName";
  size_t first = last;

  // if this is operator collect operator parens

  size_t len = se.find("operator");
  if(len < se.length()-1)
  {
    first = len;
    if(se[len+1] == "(")
      last = se.find(")",last+1);
    else
      last = se.find("(") - 1;
  }

  // if this is a member function collect class name

  if(first > 0 && se[first-1]=="~")
    --first;
  if(first > 1 && se[first-1]=="::")
    first -= 2;
  
  // if this is a template collect complete class name

  if(se[first] == ">")
  {
    while(first != 0 && se[first] != "<")
      --first;  // find <
    --first;    // find class name
  }
  if(first < 0 || se.length() <= last)
    return "error in display::functionName";
  
  // ok, now collect

  std::string temp;
  for(size_t i=first; i<=last; ++i)
    temp += se[i];
  return temp;
}
//
/////////////////////////////////////////////////////////////////////
//  test stub                                                      //
/////////////////////////////////////////////////////////////////////

#ifdef TEST_DISPLAY

#include <iostream>
#include <fstream>
#include "grammar.h"

int main(int argc, char* argv[])
{
  if(argc==1)
  {
    std::cout 
      << "\n  please enter name of file to process on command line\n\n";
    return 1;
  }
  std::ifstream in(argv[1]);
  if(!in.good())
  {
    std::cout << "\n  can't read file " << argv[1] << "\n\n";
    return 1;
  }
  Scanner::CToker toker(&in);
  toker.registerDefaultFilters();
  Scanner::CSemiExp se(&toker);
  se.registerDefaultFilters();
  display d;

  std::cout << "\n  processing file " << argv[1];
  std::cout << "\n -----------------" 
            << std::string(strlen(argv[1])+1,'-') << '\n';
  while(se.get())
  {
    if(grammar(se).functionDef())
    {
      std::cout << "\n  " << (d.functionName(se).c_str());
    }
  }
  std::cout << "\n\n";
}

#endif