#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#include "file_reader_subclass.h"

#define BUFLEN 4096

static void fileError(FileReaderSubclass this) {
  perror(this->filename);
  fprintf(stderr, "Some error reading file '%s'\n", this->filename);
  exit(2);
}

FileReaderSubclass FileReaderSubclass_constructor(FileReaderSubclass this, const char* fname) {
  FileReader_constructor((FileReader)this, fname);  // call superclass constructor

  // initialize the instance variables peculiar to this class
  this->nFileOps = 0;

  return this;
}

FileReaderSubclass FileReaderSubclass_new(const char* fname) {
  FileReaderSubclass this =
    (FileReaderSubclass)malloc(sizeof(struct FileReaderSubclass_st));
  if ( this == NULL ) fileError(this);

  return FileReaderSubclass_constructor(this, fname);
}

char FileReaderSubclass__newBuf(FileReaderSubclass this) {
  char result = FileReader__newBuf((FileReader)this);
  this->nFileOps++;
  return result;
}

void FileReaderSubclass_destructor(FileReaderSubclass this) {
  FileReader_destructor((FileReader)this);
  // there's nothing peculiar to this class to destroy
}

void FileReaderSubclass_delete(FileReaderSubclass this) {
  FileReaderSubclass_destructor(this);
  free(this);
}

int FileReaderSubclass_fileOps(FileReaderSubclass this) {
  return this->nFileOps;
}