mirror of
https://github.com/XRPLF/rippled.git
synced 2026-08-03 04:01:01 +00:00
367c3a5bfc
The View hierarchy of classes is reorganized to include new classes with member functions moved and renamed, to solve defects in the original design: OpenView accumulates raw state and tx changes and can be applied to the base. ApplyView accumulates changes for a single transaction, including metadata, and can be applied to an OpenView. The Sandbox allows changes with the option to apply or throw them out. The PaymentSandbox provides a sandbox with account credit deferral. Call sites are changed to use the class appropriate for the task.
84 lines
2.4 KiB
C++
84 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 <BeastConfig.h>
|
|
#include <ripple/app/tx/impl/BookTip.h>
|
|
|
|
namespace ripple {
|
|
|
|
BookTip::BookTip (ApplyView& view, BookRef book)
|
|
: view_ (view)
|
|
, m_valid (false)
|
|
, m_book (getBookBase (book))
|
|
, m_end (getQualityNext (m_book))
|
|
{
|
|
}
|
|
|
|
bool
|
|
BookTip::step ()
|
|
{
|
|
if (m_valid)
|
|
{
|
|
if (m_entry)
|
|
{
|
|
offerDelete (view_, m_entry);
|
|
m_entry = nullptr;
|
|
}
|
|
}
|
|
|
|
for(;;)
|
|
{
|
|
// See if there's an entry at or worse than current quality. Notice
|
|
// that the quality is encoded only in the index of the first page
|
|
// of a directory.
|
|
auto const first_page =
|
|
view_.succ (m_book, m_end);
|
|
|
|
if (! first_page)
|
|
return false;
|
|
|
|
unsigned int di = 0;
|
|
std::shared_ptr<SLE> dir;
|
|
|
|
if (dirFirst (view_, *first_page, dir, di, m_index))
|
|
{
|
|
m_dir = dir->key();
|
|
m_entry = view_.peek(keylet::offer(m_index));
|
|
m_quality = Quality (getQuality (*first_page));
|
|
m_valid = true;
|
|
|
|
// Next query should start before this directory
|
|
m_book = *first_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 = *first_page;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
}
|