Registry Explorer (console tool) by Nedko Arnaoudov added to the system utilities subtree.

Also here: http://www.geocities.com/registryexplorer/

svn path=/trunk/; revision=1375

rosapps/sysutils/regexpl/TextHistory.cpp

@@ -0,0 +1,81 @@
+/* $Id: TextHistory.cpp,v 1.1 2000/10/04 21:04:31 ea Exp $
+ *
+ * regexpl - Console Registry Explorer
+ *
+ * Copyright (c) 1999-2000 Nedko Arnaoudov <nedkohome@atia.com>
+ *
+ * License: GNU GPL
+ *
+ */
+
+// 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;
+}