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/* Copyright (C) 2006   db4objects Inc.   http://www.db4o.com */#include "Stdafx.h"#include "NativeIoAdapter.h"using namespace System;using namespace System::IO;using namespace System::Runtime::InteropServices;using namespace cli;#define LPCWSTR_FROM_MSTR(x) ((LPCWSTR) Marshal::StringToHGlobalUni(x).ToPointer())#define FREE_LPCWSTR(x) (Marshal::FreeHGlobal(IntPtr((void *)x)))#define SEEK(h,p) (SetFilePointerEx(h, *reinterpret_cast<LARGE_INTEGER*>(&p), 0, FILE_BEGIN))namespace Db4objects{namespace Db4o{namespace IO{IoAdapter ^NativeIoAdapter::Open(String ^path, bool lock, long long initialLength){	LPCWSTR file = LPCWSTR_FROM_MSTR(path);	m_handle = CreateFile(		file,		GENERIC_READ | GENERIC_WRITE,		lock ? NULL : FILE_SHARE_READ | FILE_SHARE_WRITE,		NULL,		OPEN_ALWAYS,		FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS | FILE_FLAG_SEQUENTIAL_SCAN,		NULL);	FREE_LPCWSTR(file);	if (m_handle == INVALID_HANDLE_VALUE)		throw gcnew IOException(String::Concat("Failed to get an handle to ", path));	if (initialLength > 0)	{		Seek(initialLength - 1);		Write (gcnew array<unsigned char> {0}, 1);	}	return this;}long long NativeIoAdapter::GetLength(){	return (long long)GetFileSize(m_handle, NULL);}int NativeIoAdapter::Read(array<unsigned char> ^bytes, int length){	DWORD read;	pin_ptr<unsigned char> pb = &bytes[0];	ReadFile(m_handle, pb, length, &read, NULL);	return (int)read;}void NativeIoAdapter::Seek(long long position){	SEEK(m_handle, position);}void NativeIoAdapter::Sync(){	FlushFileBuffers(m_handle);}void NativeIoAdapter::Write(array<unsigned char> ^bytes, int length){	pin_ptr<unsigned char> pb = &bytes[0];	WriteFile(m_handle, pb, length, NULL, NULL);}//void NativeIoAdapter::Copy(long long oldAddress, long long newAddress, int length)//{//	DWORD cbRead = 0;//	void* buffer = LocalAlloc(LMEM_FIXED, length);//	if (NULL != buffer)//	{//		SEEK(m_handle, oldAddress);//		ReadFile(m_handle, buffer, length, &cbRead, NULL);//		if (cbRead == length)//		{//			DWORD cbWritten = 0;//			SEEK(m_handle, newAddress);//			WriteFile(m_handle, buffer, length, &cbWritten, NULL);//		}////		LocalFree(buffer);//	}//}void NativeIoAdapter::Close(){	CloseHandle(m_handle);}void NativeIoAdapter::Delete(String ^path){	File::Delete(path);}bool NativeIoAdapter::Exists(String ^path){	return File::Exists(path);}}}}