// course.cpp
// ----------------------------------------------------------------------
// functions for reading Course data from a file, printing Course
// arrays, finding time conflicts
// 
// CSE 143
// Homework 1
// http://www.cs.washington.edu/education/courses/143/00su/homework/hw1/
// 20 Jun 2000
// 
// your name and e-mail address
// your student number
// your section ID


#include <iostream.h>
#include <fstream.h>
#include <string.h>
#include <assert.h>

#include "course.h"


//////////////////////////////////////////////////////////////////////

// preconditions: fileName contains a valid string
//
// postcondition: if fileName was a valid course file, the data has
// been placed in the array, and countCourses is set to the number of
// courses read; if fileName was not valid, countCourses is set to -1

// (Do not modify this function.)

void readCourseFile(char fileName[], Course courseList[], 
		    int maxCourseCount, int &countCourses) {

  assert(maxCourseCount > 0);

  // Mac and UNIX users:  omit ios::nocreate argument
  ifstream inFile(fileName, ios::nocreate);

  if (! inFile.good()) {
    cerr << endl << "unable to open file: " << fileName << endl;
    countCourses = -1;
    return;
  }

  // counts number of courses read so far
  countCourses = 0;		

  while (inFile.good() && (countCourses < maxCourseCount)) {
    // temporary variable while we fill in the data so that we only
    // have to deal with array indexing once at the end
    Course c; 

    // read name, then lecture start time and duration, both in units
    // of hours
    inFile.getline(c.name, MAX_NAME_LENGTH);
    inFile >> c.meetingTime >> c.duration;

    // very simple error-checking

    // meeting times must be on the hour in 24-hour format
    if (c.meetingTime < 0 || c.meetingTime > 23) {
      cerr << "course " << c.name 
	   << ": meeting time out of range 0-23" << endl;
      countCourses = -1;
      return;
    }

    // duration should be in hours
    if (c.duration <= 0) {
      cerr << "course " << c.name 
	   << ": meeting duration must be positive, nonzero" << endl;
      countCourses = -1;
      return;
    }

    // we need to skip the trailing whitespace after times;
    // eat trailing characters, including \n
    char line[MAX_NAME_LENGTH]; 
    inFile.getline(line, MAX_NAME_LENGTH); 

    // copy the struct, filled with data
    courseList[countCourses] = c; 

    countCourses++;
  }

} // end readCourseFile


//////////////////////////////////////////////////////////////////////	

// *** define functions printCourseList, reportTimeConflicts here ***