mirror of
https://github.com/reactos/reactos.git
synced 2024-11-09 08:08:38 +00:00
93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
/* $Id$
|
|
*
|
|
* regexpl - Console Registry Explorer
|
|
*
|
|
* Copyright (C) 2000-2005 Nedko Arnaudov <nedko@users.sourceforge.net>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
// TextHistory.cpp: implementation of the CTextHistory class.
|
|
//
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
#include "ph.h"
|
|
#include "TextHistory.h"
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Construction/Destruction
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
CTextHistory::CTextHistory()
|
|
{
|
|
m_pHistoryBuffer = NULL;
|
|
m_dwMaxHistoryLines = 0;
|
|
}
|
|
|
|
CTextHistory::~CTextHistory()
|
|
{
|
|
if (m_pHistoryBuffer) delete m_pHistoryBuffer;
|
|
}
|
|
|
|
BOOL CTextHistory::Init(DWORD dwMaxHistoryLineSize, DWORD dwMaxHistoryLines)
|
|
{
|
|
if (!dwMaxHistoryLines)
|
|
{
|
|
ASSERT(FALSE);
|
|
return FALSE;
|
|
}
|
|
if (m_pHistoryBuffer) delete m_pHistoryBuffer;
|
|
m_dwFirstHistoryIndex = 0;
|
|
m_dwLastHistoryIndex = 0;
|
|
m_dwHisoryFull = 0;
|
|
m_dwMaxHistoryLines = dwMaxHistoryLines;
|
|
m_dwMaxHistoryLineSize = dwMaxHistoryLineSize;
|
|
m_pHistoryBuffer = new TCHAR [m_dwMaxHistoryLines*dwMaxHistoryLineSize];
|
|
if (!m_pHistoryBuffer) return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
void CTextHistory::AddHistoryLine(const TCHAR *pchLine)
|
|
{
|
|
if (!m_pHistoryBuffer) return;
|
|
if (_tcslen(pchLine) == 0) return;
|
|
if (_tcslen(pchLine) >= m_dwMaxHistoryLineSize)
|
|
{
|
|
ASSERT(FALSE);
|
|
return;
|
|
}
|
|
if (m_dwHisoryFull == m_dwMaxHistoryLines) // if buffer is full, replace last
|
|
{
|
|
ASSERT(m_dwFirstHistoryIndex == m_dwLastHistoryIndex);
|
|
m_dwLastHistoryIndex = (m_dwLastHistoryIndex+1)%m_dwMaxHistoryLines;
|
|
}
|
|
ASSERT(m_dwFirstHistoryIndex < m_dwMaxHistoryLines);
|
|
_tcscpy(m_pHistoryBuffer+m_dwFirstHistoryIndex*m_dwMaxHistoryLineSize,pchLine);
|
|
m_dwFirstHistoryIndex = (m_dwFirstHistoryIndex+1)%m_dwMaxHistoryLines;
|
|
ASSERT(m_dwHisoryFull <= m_dwMaxHistoryLines);
|
|
if (m_dwHisoryFull < m_dwMaxHistoryLines) m_dwHisoryFull++;
|
|
}
|
|
|
|
const TCHAR * CTextHistory::GetHistoryLine(DWORD dwIndex)
|
|
{
|
|
if (!m_pHistoryBuffer) return NULL;
|
|
ASSERT(m_dwHisoryFull <= m_dwMaxHistoryLines);
|
|
if (dwIndex >= m_dwHisoryFull) return NULL;
|
|
dwIndex = m_dwHisoryFull - dwIndex - 1;
|
|
dwIndex = (dwIndex+m_dwLastHistoryIndex) % m_dwMaxHistoryLines;
|
|
ASSERT(dwIndex < m_dwMaxHistoryLines);
|
|
return m_pHistoryBuffer+dwIndex*m_dwMaxHistoryLineSize;
|
|
}
|