void spec_compress(int in, int out, int lev) {
level=lev;
part_nb=0;
clear_bufs();
ifd=in;
ofd=out;
zip(ifd,ofd);
}
void spec_uncompress(int in, int out, int lev) {
level=lev;
part_nb=0;
clear_bufs();
ifd=in;
ofd=out;
method = get_method(1);
unzip(ifd,ofd);
}
int posix_storage::readv(session_settings const&
, span<iovec_t const> bufs
, piece_index_t const piece, int const offset
, storage_error& error)
{
return readwritev(files(), bufs, piece, offset, error
, [this](file_index_t const file_index
, std::int64_t const file_offset
, span<iovec_t const> vec, storage_error& ec)
{
if (files().pad_file_at(file_index))
{
// reading from a pad file yields zeroes
clear_bufs(vec);
return bufs_size(vec);
}
FILE* const f = open_file(file_index, open_mode::read_only
, file_offset, ec);
if (ec.ec) return -1;
// set this unconditionally in case the upper layer would like to treat
// short reads as errors
ec.operation = operation_t::file_read;
int ret = 0;
for (auto buf : vec)
{
int const r = static_cast<int>(fread(buf.data(), 1
, static_cast<std::size_t>(buf.size()), f));
if (r == 0)
{
ec.ec.assign(errno, generic_category());
break;
}
ret += r;
// the file may be shorter than we think
if (r < buf.size()) break;
}
fclose(f);
// we either get an error or 0 or more bytes read
TORRENT_ASSERT(ec.ec || ret > 0);
TORRENT_ASSERT(ret <= bufs_size(vec));
if (ec.ec)
{
ec.file(file_index);
return -1;
}
return ret;
});
}
