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Reorganize source file hierarchy:
* Rename unity files * Move some modules to new subdirectories * Remove obsolete Visual Studio project files * Remove obsolete coding style and TODO list
This commit is contained in:
Vinnie Falco
170
src/ripple/module/app/book/impl/OfferStream.cpp
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170
src/ripple/module/app/book/impl/OfferStream.cpp
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//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#include <ripple/module/app/book/OfferStream.h>
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namespace ripple {
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namespace core {
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OfferStream::OfferStream (LedgerView& view, LedgerView& view_cancel,
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BookRef book, Clock::time_point when, beast::Journal journal)
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: m_journal (journal)
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, m_view (view)
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, m_view_cancel (view_cancel)
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, m_book (book)
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, m_when (when)
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, m_tip (view, book)
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{
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}
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// Handle the case where a directory item with no corresponding ledger entry
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// is found. This shouldn't happen but if it does we clean it up.
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void
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OfferStream::erase (LedgerView& view)
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{
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// NIKB NOTE This should be using LedgerView::dirDelete, which would
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// correctly remove the directory if its the last entry.
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// Unfortunately this is a protocol breaking change.
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auto p (view.entryCache (ltDIR_NODE, m_tip.dir()));
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if (p == nullptr)
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{
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if (m_journal.error) m_journal.error <<
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"Missing directory " << m_tip.dir() <<
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" for offer " << m_tip.index();
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return;
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}
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auto v (p->getFieldV256 (sfIndexes));
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auto& x (v.peekValue());
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auto it (std::find (x.begin(), x.end(), m_tip.index()));
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if (it == x.end())
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{
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if (m_journal.error) m_journal.error <<
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"Missing offer " << m_tip.index() <<
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" for directory " << m_tip.dir();
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return;
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}
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x.erase (it);
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p->setFieldV256 (sfIndexes, v);
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view.entryModify (p);
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if (m_journal.trace) m_journal.trace <<
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"Missing offer " << m_tip.index() <<
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" removed from directory " << m_tip.dir();
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}
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bool
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OfferStream::step ()
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{
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// Modifying the order or logic of these
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// operations causes a protocol breaking change.
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for(;;)
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{
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// BookTip::step deletes the current offer from the view before
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// advancing to the next (unless the ledger entry is missing).
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if (! m_tip.step())
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return false;
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SLE::pointer const& entry (m_tip.entry());
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// Remove if missing
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if (! entry)
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{
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erase (view());
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erase (view_cancel());
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continue;
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}
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// Remove if expired
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if (entry->isFieldPresent (sfExpiration) &&
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entry->getFieldU32 (sfExpiration) <= m_when)
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{
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view_cancel().offerDelete (entry->getIndex());
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if (m_journal.trace) m_journal.trace <<
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"Removing expired offer " << entry->getIndex();
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continue;
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}
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m_offer = Offer (entry, m_tip.quality());
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Amounts const amount (m_offer.amount());
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// Remove if either amount is zero
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if (amount.empty())
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{
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view_cancel().offerDelete (entry->getIndex());
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if (m_journal.warning) m_journal.warning <<
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"Removing bad offer " << entry->getIndex();
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m_offer = Offer{};
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continue;
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}
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// Calculate owner funds
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// NIKB NOTE The calling code also checks the funds, how expensive is
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// looking up the funds twice?
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Amount const owner_funds (view().accountFunds (
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m_offer.account(), m_offer.amount().out));
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// Check for unfunded offer
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if (owner_funds <= zero)
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{
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// If the owner's balance in the pristine view is the same,
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// we haven't modified the balance and therefore the
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// offer is "found unfunded" versus "became unfunded"
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if (view_cancel().accountFunds (m_offer.account(),
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m_offer.amount().out) == owner_funds)
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{
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view_cancel().offerDelete (entry->getIndex());
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if (m_journal.trace) m_journal.trace <<
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"Removing unfunded offer " << entry->getIndex();
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}
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else
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{
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if (m_journal.trace) m_journal.trace <<
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"Removing became unfunded offer " << entry->getIndex();
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}
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m_offer = Offer{};
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continue;
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}
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break;
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}
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return true;
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}
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bool
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OfferStream::step_account (Account const& account)
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{
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while (step ())
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{
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if (tip ().account () != account)
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return true;
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}
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return false;
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}
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}
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}
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