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8f88d915ba
Changes made to support autobridging and improve the offer-crossing and
pathfinding logic result in transaction-breaking changes which cause
incompatibilities between 0.27 and 0.28 builds of RippleD.
This patch simplifies deployment of 0.28 on the Ripple network by allowing
RippleD to emulate the 0.27 semantics while the last closed ledger closed
before March 30, 2015 at 13:00:00 PDT, after which time the new 0.28
semantics will become active.
The transaction-breaking changes addressed in this commit are:
3ccbd7c9b2
b203db27a4
86 lines
2.4 KiB
C++
86 lines
2.4 KiB
C++
//------------------------------------------------------------------------------
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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) 2014 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 <BeastConfig.h>
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#include <ripple/legacy/0.27/book/BookTip.h>
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namespace ripple {
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namespace legacy {
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namespace core {
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BookTip::BookTip (LedgerView& view, BookRef book)
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: m_view (view)
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, m_valid (false)
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, m_book (getBookBase (book))
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, m_end (getQualityNext (m_book))
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, m_quality ()
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{
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}
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bool
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BookTip::step ()
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{
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if (m_valid)
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{
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if (m_entry)
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{
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view().offerDelete (m_index);
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m_entry = nullptr;
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}
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}
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for(;;)
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{
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// See if there's an entry at or worse than current quality.
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auto const first_page (view().getNextLedgerIndex (m_book, m_end));
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if (first_page.isZero())
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return false;
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unsigned int di (0);
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SLE::pointer dir;
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if (view().dirFirst (first_page, dir, di, m_index))
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{
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m_dir = dir->getIndex();
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m_entry = view().entryCache (ltOFFER, m_index);
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m_quality = Quality (getQuality (first_page));
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m_valid = true;
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// Next query should start before this directory
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m_book = first_page;
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// The quality immediately before the next quality
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--m_book;
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break;
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}
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// There should never be an empty directory but just in case,
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// we handle that case by advancing to the next directory.
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m_book = first_page;
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}
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return true;
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}
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}
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}
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}
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