/*
 * Program to read a text file and copy the contents to another file
 * after printing it to the screen. Demonstrates arrays are passed by
 * reference and structs are passed by value. Check in gdb.
 */

#include <iostream>
#include <fstream>
#include <cstdlib>
using namespace std;

int saveRecToFile(struct finfo rec);
int saveArrToFile(struct finfo *, int);

const int MAX_REC = 100;
struct finfo{
  string name;
  int codesize, dycount;
};

int main()
{
  int index, num;
  char ch;
  string str;
  struct finfo fRecord[MAX_REC];

  /* open the input file */
  ifstream ifile("tfile.txt");
  if(!ifile){
    cout << "File tfile.txt cannot be opened for reading\n";
    exit(-1);
  }

  /* Read all file records into the structure */
  index = 0;
  while(ifile.peek() != EOF){
    ifile >> str; // reads until whitespace
    cout << str;
    ifile >> str; // read function name
    cout << str;
    fRecord[index].name = str;
    ifile >> str;
    cout << str;
    ifile >> num; // read codesize
    cout << num;
    fRecord[index].codesize = num;
    ifile >> str;
    cout << str;
    ifile >> str;
    cout << str;
    ifile >> num; // read Dy. Count
    cout << num;
    fRecord[index].dycount = num;
    ifile.get(ch);
    cout << ch;
    index++;
  }

  ifile.close();

  /* Save the structure to another file */
  for(int i=0 ; i<index ; i++)
    saveRecToFile(fRecord[i]);

  /* Pass the entire array of structures to a function to print to a file*/
  saveArrToFile(fRecord, index);
  return 0;
}


/*
 * saveRecToFile - Save a single record to a file
 */
int saveRecToFile(struct finfo rec)
{
  ofstream ofile("newFile.txt", ios::app);

  ofile << "Function: " << rec.name
	<< " Codesize: " << rec.codesize
	<< " Dy. Count: " << rec.dycount << endl;

  ofile.close();
  return 0;
}


/*
 * saveArrToFile - Save the passed structure fields to another file
 */
int saveArrToFile(struct finfo *recPtr, int index)
{
  int i;
  ofstream ofile("newFile.txt", ios::app);

  for(i=0 ; i<index ; i++)
    ofile << "Function: " << recPtr[i].name
	  << " Codesize: " << recPtr[i].codesize
	  << " Dy. Count: " << recPtr[i].dycount << endl;

  ofile.close();
  return 0;
}