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refactor: use std::ifstream in torrent-magnet (#3726)

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Charles Kerr 2022-08-28 12:33:58 -05:00 • committed by GitHub
parent 185f1f96a5
commit 6c5fda2021
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2 changed files with 18 additions and 21 deletions
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38
libtransmission/torrent-magnet.cc
View file

@ -7,6 +7,7 @@
#include <climits> /* INT_MAX */
#include <ctime>
#include <deque>
#include <fstream>
#include <string>
#include <string_view>
#include <vector>
@ -17,7 +18,6 @@
#include "crypto-utils.h" /* tr_sha1() */
#include "error.h"
#include "file.h"
#include "log.h"
#include "magnet-metainfo.h"
#include "resume.h"
@ -123,35 +123,31 @@ std::optional<std::vector<std::byte>> tr_torrentGetMetadataPiece(tr_torrent cons
return {};
}
auto const fd = tr_sys_file_open(tor->torrentFile(), TR_SYS_FILE_READ, 0);
if (fd == TR_BAD_SYS_FILE)
auto in = std::ifstream{ tor->torrentFile(), std::ios_base::in };
if (!in.is_open())
{
return {};
}
auto const info_dict_size = tor->infoDictSize();
TR_ASSERT(info_dict_size > 0);
if (size_t const o = piece * METADATA_PIECE_SIZE; tr_sys_file_seek(fd, tor->infoDictOffset() + o, TR_SEEK_SET, nullptr))
auto const offset_in_info_dict = static_cast<uint64_t>(piece) * METADATA_PIECE_SIZE;
auto const offset_in_file = tor->infoDictOffset() + offset_in_info_dict;
if (!in.seekg(offset_in_file))
{
size_t const piece_len = o + METADATA_PIECE_SIZE <= info_dict_size ? METADATA_PIECE_SIZE : info_dict_size - o;
if (piece_len <= METADATA_PIECE_SIZE)
{
auto buf = std::vector<std::byte>{};
buf.resize(piece_len);
if (auto n_read = uint64_t{};
tr_sys_file_read(fd, std::data(buf), std::size(buf), &n_read) && n_read == std::size(buf))
{
tr_sys_file_close(fd);
return buf;
}
}
return {};
}
tr_sys_file_close(fd);
return {};
auto buf = std::vector<std::byte>{};
auto const piece_len = offset_in_info_dict + METADATA_PIECE_SIZE <= info_dict_size ? METADATA_PIECE_SIZE :
info_dict_size - offset_in_info_dict;
buf.resize(piece_len);
if (!in.read(reinterpret_cast<char*>(std::data(buf)), std::size(buf)))
{
return {};
}
return buf;
}
static int getPieceLength(struct tr_incomplete_metadata const* m, int piece)

1
tests/libtransmission/CMakeLists.txt
View file

@ -36,6 +36,7 @@ add_executable(libtransmission-test
subprocess-test.cc
test-fixtures.h
torrent-files-test.cc
torrent-magnet-test.cc
torrent-metainfo-test.cc
torrents-test.cc
utils-test.cc