virtual source_result read_next(size_t amount = 0)
{
sassert(pull);
auto s = drive();
if (s == source_result::ok)
{
auto bucket = std::move(cur_out);
prepare_out();
return source_result(std::move(bucket));
}
return source_result(s);
}
virtual source_result read_next(size_t amount = 0)
{
if (!f)
return std::unique_ptr<bucket_data_mem>();
unique_ptr<bucket_data_mem> r(bucket_data_mem::create(4096));
auto read_bytes = std::fread(r->begin(), 1, 4096, f);
if(read_bytes == 0)
return source_result(source_result::eos);
r->size_ = read_bytes;
return source_result(std::move(r));
}
