Function fwrite_fully

extlibs/fmt/include/fmt/format-inl.h:166–170

A wrapper around fwrite that throws on error.

// A wrapper around fwrite that throws on error.
FMT_FUNC void fwrite_fully(const void* ptr, size_t size, size_t count,
                           FILE* stream) {
  size_t written = std::fwrite(ptr, size, count, stream);
  if (written < count) FMT_THROW(system_error(errno, "cannot write to file"));
}
}  // namespace internal

#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)