test/utils/FileInputStream.h

#ifndef __FILEINPUTSTREAM_H__
#define __FILEINPUTSTREAM_H__

#include <fstream>
#include "InputStream.h"

class FileInputStream : public InputStream {
 public:
  bool Open (const char* fileName) {
    file_.open (fileName, std::ios_base::in | std::ios_base::binary);
    return file_.is_open();
  }
  int read (void* ptr, size_t len) {
    if (!file_.good()) {
      return -1;
    }
    file_.read (static_cast<char*> (ptr), len);
    return file_.gcount();
  }
 private:
  std::ifstream file_;
};

#endif //__FILEINPUTSTREAM_H__