mirror of
https://github.com/XRPLF/rippled.git
synced 2025-11-17 17:45:52 +00:00
206efbf30d
* Split STAmount out of SerializedTypes.h * New concept of "Issue consistency": when either both or neither of its currency and account are XRP. * Stop checking for consistency of Issue in its constructor. * Clarification of mIsNative logic in STAmount. * Usual cleanups.
82 lines
2.4 KiB
C++
82 lines
2.4 KiB
C++
//------------------------------------------------------------------------------
|
|
/*
|
|
This file is part of rippled: https://github.com/ripple/rippled
|
|
Copyright (c) 2014 Ripple Labs Inc.
|
|
|
|
Permission to use, copy, modify, and/or distribute this software for any
|
|
purpose with or without fee is hereby granted, provided that the above
|
|
copyright notice and this permission notice appear in all copies.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
//==============================================================================
|
|
|
|
#include <ripple/module/app/book/BookTip.h>
|
|
|
|
namespace ripple {
|
|
namespace core {
|
|
|
|
BookTip::BookTip (LedgerView& view, BookRef book)
|
|
: m_view (view)
|
|
, m_valid (false)
|
|
, m_book (Ledger::getBookBase (
|
|
book.in.currency, book.in.account,
|
|
book.out.currency, book.out.account))
|
|
, m_end (Ledger::getQualityNext (m_book))
|
|
{
|
|
}
|
|
|
|
bool
|
|
BookTip::step ()
|
|
{
|
|
if (m_valid)
|
|
{
|
|
if (m_entry)
|
|
{
|
|
view().offerDelete (m_index);
|
|
m_entry = nullptr;
|
|
}
|
|
}
|
|
|
|
for(;;)
|
|
{
|
|
// See if there's an entry at or worse than current quality.
|
|
auto const page (
|
|
view().getNextLedgerIndex (m_book, m_end));
|
|
|
|
if (page.isZero())
|
|
return false;
|
|
|
|
unsigned int di (0);
|
|
SLE::pointer dir;
|
|
if (view().dirFirst (page, dir, di, m_index))
|
|
{
|
|
m_dir = dir->getIndex();
|
|
m_entry = view().entryCache (ltOFFER, m_index);
|
|
m_valid = true;
|
|
|
|
// Next query should start before this directory
|
|
m_book = page;
|
|
|
|
// The quality immediately before the next quality
|
|
--m_book;
|
|
|
|
break;
|
|
}
|
|
// There should never be an empty directory but just in case,
|
|
// we handle that case by advancing to the next directory.
|
|
m_book = page;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
}
|
|
}
|