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Cleanup metadata implementation

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This commit is contained in:
Marcus Holland-Moritz 2021-03-05 02:31:05 +01:00
parent 4442d2b75a
commit a5937458da
1 changed files with 38 additions and 44 deletions
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82
src/dwarfs/metadata_v2.cpp
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@ -179,15 +179,25 @@ class metadata_ : public metadata_v2::impl {
bool empty() const override { return data_.empty(); }
void walk(std::function<void(entry_view)> const& func) const override;
void walk(std::function<void(entry_view)> const& func) const override {
walk_impl(func);
}
void walk(std::function<void(entry_view, directory_view)> const& func)
const override;
const override {
walk_impl(func);
}
void
walk_inode_order(std::function<void(entry_view)> const& func) const override;
walk_inode_order(std::function<void(entry_view)> const& func) const override {
walk_inode_order_impl(func);
}
void
walk_inode_order(std::function<void(entry_view, directory_view)> const& func)
const override;
const override {
walk_inode_order_impl(func);
}
std::optional<entry_view> find(const char* path) const override;
std::optional<entry_view> find(int inode) const override;
@ -357,8 +367,19 @@ class metadata_ : public metadata_v2::impl {
void walk(uint32_t parent_ix, uint32_t entry_ix, set_type<int>& seen,
T&& func) const;
template <typename T>
void walk_tree(T&& func) const {
set_type<int> seen;
auto root = meta_.entry_index()[0];
walk(root, root, seen, std::forward<T>(func));
}
template <typename Signature>
void walk_impl(std::function<Signature> const& func) const;
void walk_impl(std::function<Signature> const& func) const {
walk_tree([&](uint32_t entry, uint32_t parent) {
walk_call(func, entry, parent);
});
}
template <typename Signature>
void walk_inode_order_impl(std::function<Signature> const& func) const;
@ -605,74 +626,47 @@ template <typename T>
void metadata_<LoggerPolicy>::walk(uint32_t parent_ix, uint32_t entry_ix,
set_type<int>& seen, T&& func) const {
func(entry_ix, parent_ix);
auto entry = make_entry_view(entry_ix);
if (S_ISDIR(entry.mode())) {
auto inode = entry.inode();
if (!seen.emplace(inode).second) {
DWARFS_THROW(runtime_error, "cycle detected during directory walk");
}
auto dir = make_directory_view(entry);
for (auto cur : dir.entry_range()) {
walk(entry_ix, cur, seen, func);
}
seen.erase(inode);
}
}
template <typename LoggerPolicy>
template <typename Signature>
void metadata_<LoggerPolicy>::walk_impl(
std::function<Signature> const& func) const {
set_type<int> seen;
walk(
meta_.entry_index()[0], meta_.entry_index()[0], seen,
[&](uint32_t entry, uint32_t parent) { walk_call(func, entry, parent); });
}
template <typename LoggerPolicy>
void metadata_<LoggerPolicy>::walk(
std::function<void(entry_view)> const& func) const {
walk_impl(func);
}
template <typename LoggerPolicy>
void metadata_<LoggerPolicy>::walk(
std::function<void(entry_view, directory_view)> const& func) const {
walk_impl(func);
}
template <typename LoggerPolicy>
template <typename Signature>
void metadata_<LoggerPolicy>::walk_inode_order_impl(
std::function<Signature> const& func) const {
std::vector<std::pair<uint32_t, uint32_t>> entries;
set_type<int> seen;
walk(meta_.entry_index()[0], meta_.entry_index()[0], seen,
[&](uint32_t entry_ix, uint32_t parent_ix) {
entries.emplace_back(entry_ix, parent_ix);
});
walk_tree([&](uint32_t entry_ix, uint32_t parent_ix) {
entries.emplace_back(entry_ix, parent_ix);
});
std::sort(entries.begin(), entries.end(),
[this](auto const& a, auto const& b) {
return meta_.entries()[a.first].inode() <
meta_.entries()[b.first].inode();
});
for (auto [entry, parent] : entries) {
walk_call(func, entry, parent);
}
}
template <typename LoggerPolicy>
void metadata_<LoggerPolicy>::walk_inode_order(
std::function<void(entry_view)> const& func) const {
walk_inode_order_impl(func);
}
template <typename LoggerPolicy>
void metadata_<LoggerPolicy>::walk_inode_order(
std::function<void(entry_view, directory_view)> const& func) const {
walk_inode_order_impl(func);
}
template <typename LoggerPolicy>
std::optional<entry_view>
metadata_<LoggerPolicy>::find(directory_view dir, std::string_view name) const {