#ifndef FILEREADERSUBCLASS_H
#define FILEREADERSUBCLASS_H

#include "file_reader_class.h"

typedef struct FileReaderSubclass_st {
  char*   filename;
  int     f;
  char*   buf;
  ssize_t bufLen;
  int     bufIndex;
  int     nFileOps;  // this field is new, compared with file_reader_class
} * FileReaderSubclass;

FileReaderSubclass FileReaderSubclass_new(const char *filename);
#define FileReaderSubclass_nextChar(p) ( p->bufIndex < p->bufLen ? p->buf[p->bufIndex++] : FileReaderSubclass__newBuf(p) )
char FileReaderSubclass__newBuf(FileReaderSubclass r);
void FileReaderSubclass_delete(FileReaderSubclass r);

int  FileReaderSubclass_fileOps(FileReaderSubclass r);

#endif // FILEREADERSUBCLAS_H