From 69fe21d6e2262d6fb2b14278b7a20364468cbdcf Mon Sep 17 00:00:00 2001
From: Vadim Dashevskiy <watcherhd@gmail.com>
Date: Fri, 12 Oct 2012 09:56:01 +0000
Subject: Dbx_tree: folders restructurization

git-svn-id: http://svn.miranda-ng.org/main/trunk@1883 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
---
 plugins/Dbx_tree/src/DirectAccess.cpp | 118 ++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 plugins/Dbx_tree/src/DirectAccess.cpp

(limited to 'plugins/Dbx_tree/src/DirectAccess.cpp')

diff --git a/plugins/Dbx_tree/src/DirectAccess.cpp b/plugins/Dbx_tree/src/DirectAccess.cpp
new file mode 100644
index 0000000000..33785af7c4
--- /dev/null
+++ b/plugins/Dbx_tree/src/DirectAccess.cpp
@@ -0,0 +1,118 @@
+/*
+
+dbx_tree: tree database driver for Miranda IM
+
+Copyright 2007-2010 Michael "Protogenes" Kunz,
+
+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; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#include "DirectAccess.h"
+#include "Logger.h"
+
+CDirectAccess::CDirectAccess(const TCHAR* FileName)
+: CFileAccess(FileName)
+{
+	m_File = CreateFile(FileName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, 0);
+	CHECKSYS(m_File != INVALID_HANDLE_VALUE,
+		logCRITICAL, _T("CreateFile failed"));
+
+	m_MinAllocGranularity = 0x00001000;  // 4kb   to avoid heavy fragmentation
+	m_AllocGranularity    = 0x00008000;  // 32kb
+	m_MaxAllocGranularity = 0x00100000;  // 1mb   for fast increasing
+
+	uint32_t size = GetFileSize(m_File, NULL);
+	size = (size + m_AllocGranularity - 1) & ~(m_AllocGranularity - 1);
+
+	if (size == 0)
+		size = m_AllocGranularity;
+
+	m_AllocSize = size;
+
+	InitJournal();
+}
+
+CDirectAccess::~CDirectAccess()
+{
+	if (m_File)
+	{
+		if (INVALID_SET_FILE_POINTER != SetFilePointer(m_File, m_Size, NULL, FILE_BEGIN))
+			SetEndOfFile(m_File);
+
+		CloseHandle(m_File);
+	}
+}
+
+uint32_t CDirectAccess::_Read(void* Buf, uint32_t Source, uint32_t Size)
+{
+	DWORD read = 0;
+
+	CHECKSYS(INVALID_SET_FILE_POINTER != SetFilePointer(m_File, Source, NULL, FILE_BEGIN),
+		logERROR, _T("SetFilePointer failed"));
+
+	CHECKSYS(ReadFile(m_File, Buf, Size, &read, NULL),
+		logERROR, _T("ReadFile failed"));
+
+	return read;
+}
+uint32_t CDirectAccess::_Write(void* Buf, uint32_t Dest, uint32_t Size)
+{
+	DWORD written = 0;
+
+	CHECKSYS(INVALID_SET_FILE_POINTER != SetFilePointer(m_File, Dest, NULL, FILE_BEGIN),
+		logERROR, _T("SetFilePointer failed"));
+
+	CHECKSYS(WriteFile(m_File, Buf, Size, &written, NULL),
+		logERROR, _T("WriteFile failed"));
+
+	return written;
+}
+
+uint32_t CDirectAccess::_SetSize(uint32_t Size)
+{
+	CHECKSYS(INVALID_SET_FILE_POINTER != SetFilePointer(m_File, Size, NULL, FILE_BEGIN),
+		logERROR, _T("SetFilePointer failed"));
+
+	CHECKSYS(SetEndOfFile(m_File),
+		logERROR, _T("SetEndOfFile failed"));
+
+	return Size;		
+}
+
+void CDirectAccess::_Invalidate(uint32_t Dest, uint32_t Size)
+{
+	DWORD written;
+	uint8_t buf[4096];
+	memset(buf, 0, sizeof(buf));
+
+	CHECKSYS(INVALID_SET_FILE_POINTER != SetFilePointer(m_File, Dest, NULL, FILE_BEGIN),
+		logERROR, _T("SetFilePointer failed"));
+
+	while (Size > sizeof(buf))
+	{
+		Size -= sizeof(buf);
+		CHECKSYS(WriteFile(m_File, buf, sizeof(buf), &written, NULL),
+			logERROR, _T("WriteFile failed"));
+	}
+	CHECKSYS(WriteFile(m_File, buf, Size, &written, NULL),
+		logERROR, _T("WriteFile failed"));
+}
+
+void CDirectAccess::_Flush()
+{
+	CHECKSYS(FlushFileBuffers(m_File),
+		logERROR, _T("FlushFileBuffers failed"));
+}
-- 
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