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fix: loading 2.20-3.00 progress from resume (#6896)

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* fix: loading `2.20-3.00` progress from resume

* code review: fix always 0
This commit is contained in:
Yat Ho
2024-07-14 15:37:43 +08:00
committed by GitHub
parent a76a07ae99
commit a92fc3b76e
1 changed files with 18 additions and 5 deletions
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23
libtransmission/resume.cc
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@@ -8,6 +8,7 @@
#include <cstdint>
#include <cstring>
#include <ctime>
#include <limits>
#include <string_view>
#include <vector>
@@ -523,16 +524,28 @@ tr_resume::fields_t loadProgress(tr_variant* dict, tr_torrent* tor, tr_torrent::
}
else if (b != nullptr && b->holds_alternative<tr_variant::Vector>())
{
// The first element (idx 0) stores a base value for all piece timestamps,
// which would be the value of the smallest piece timestamp minus 1.
//
// The rest of the elements are the timestamp of each piece, stored as
// an offset to the base value.
// i.e. idx 1 <-> piece 0, idx 2 <-> piece 1, ...
// timestamp of piece n = idx 0 + idx n+1
//
// Pieces that haven't been checked will have a timestamp offset of 0.
// They can be differentiated from the oldest checked piece(s) since the
// offset for any checked pieces will be at least 1.
auto offset = int64_t{};
tr_variantGetInt(tr_variantListChild(b, 0), &offset);
time_checked = tr_time();
auto const [piece_begin, piece_end] = tor->piece_span_for_file(fi);
for (size_t i = 0, n = piece_end - piece_begin; i < n; ++i)
time_checked = std::numeric_limits<time_t>::max();
for (tr_piece_index_t i = 1, n = piece_end - piece_begin; i <= n; ++i)
{
int64_t piece_time = 0;
tr_variantGetInt(tr_variantListChild(b, i + 1), &piece_time);
time_checked = std::min(time_checked, time_t(piece_time));
auto t = int64_t{};
tr_variantGetInt(tr_variantListChild(b, i), &t);
time_checked = std::min(time_checked, time_t(t != 0 ? t + offset : 0));
}
}