ref: ecb7fbc6a05083422254ceeb5bf0f0d0d8d10a5c
dir: /test/utils/InputStream.h/
#ifndef __INPUTSTREAM_H__
#define __INPUTSTREAM_H__
#include <cstddef>
struct InputStream {
  virtual int read(void* ptr, size_t len) = 0;
};
#endif //__INPUTSTREAM_H__