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https://github.com/XRPLF/rippled.git
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5f638f5553
This change updates the ColumnLimit from 80 to 120, and applies clang-format to reformat the code.
117 lines
2.5 KiB
C++
117 lines
2.5 KiB
C++
#include <xrpl/ledger/Dir.h>
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namespace xrpl {
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using const_iterator = Dir::const_iterator;
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Dir::Dir(ReadView const& view, Keylet const& key) : view_(&view), root_(key), sle_(view_->read(root_))
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{
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if (sle_ != nullptr)
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indexes_ = &sle_->getFieldV256(sfIndexes);
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}
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auto
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Dir::begin() const -> const_iterator
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{
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auto it = const_iterator(*view_, root_, root_);
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if (sle_ != nullptr)
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{
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it.sle_ = sle_;
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if (!indexes_->empty())
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{
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it.indexes_ = indexes_;
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it.it_ = std::begin(*indexes_);
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it.index_ = *it.it_;
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}
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}
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return it;
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}
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auto
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Dir::end() const -> const_iterator
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{
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return const_iterator(*view_, root_, root_);
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}
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bool
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const_iterator::operator==(const_iterator const& other) const
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{
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if (view_ == nullptr || other.view_ == nullptr)
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return false;
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XRPL_ASSERT(
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view_ == other.view_ && root_.key == other.root_.key,
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"xrpl::const_iterator::operator== : views and roots are matching");
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return page_.key == other.page_.key && index_ == other.index_;
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}
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const_iterator::reference
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const_iterator::operator*() const
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{
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XRPL_ASSERT(index_ != beast::zero, "xrpl::const_iterator::operator* : nonzero index");
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if (!cache_)
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cache_ = view_->read(keylet::child(index_));
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return *cache_;
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}
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const_iterator&
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const_iterator::operator++()
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{
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XRPL_ASSERT(index_ != beast::zero, "xrpl::const_iterator::operator++ : nonzero index");
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if (++it_ != std::end(*indexes_))
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{
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index_ = *it_;
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cache_ = std::nullopt;
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return *this;
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}
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return next_page();
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}
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const_iterator
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const_iterator::operator++(int)
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{
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XRPL_ASSERT(index_ != beast::zero, "xrpl::const_iterator::operator++(int) : nonzero index");
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const_iterator tmp(*this);
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++(*this);
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return tmp;
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}
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const_iterator&
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const_iterator::next_page()
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{
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auto const next = sle_->getFieldU64(sfIndexNext);
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if (next == 0)
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{
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page_.key = root_.key;
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index_ = beast::zero;
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}
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else
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{
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page_ = keylet::page(root_, next);
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sle_ = view_->read(page_);
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XRPL_ASSERT(sle_, "xrpl::const_iterator::next_page : non-null SLE");
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indexes_ = &sle_->getFieldV256(sfIndexes);
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if (indexes_->empty())
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{
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index_ = beast::zero;
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}
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else
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{
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it_ = std::begin(*indexes_);
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index_ = *it_;
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}
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}
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cache_ = std::nullopt;
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return *this;
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}
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std::size_t
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const_iterator::page_size()
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{
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return indexes_->size();
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}
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} // namespace xrpl
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