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Reactos
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C++
at master
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293/* * 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 (std::nothrow) 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;}