Exemplos de crcFile32 em C++ (Cpp)

Exemplo n.º 1

Arquivo: AXPUtil.cpp Projeto: gitrider/wxsj2

//检查文件尾部的CRC校验码
bool checkCRCFlag(const char* szFileName)
{
	//计算文件crc
	unsigned int nCRC;
	if(!crcFile32(szFileName, nCRC, true)) return false;

	//打开文件
	HANDLE hFile = ::CreateFile(szFileName, 
						GENERIC_READ,
						FILE_SHARE_READ|FILE_SHARE_WRITE,
						0,
						OPEN_EXISTING,
						FILE_ATTRIBUTE_ARCHIVE | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_SEQUENTIAL_SCAN,
						0);

	if(hFile == INVALID_HANDLE_VALUE)
	{
		setLastError(AXP_ERR_FILE_ACCESS, "File=%s, WinErr=%d", szFileName, ::GetLastError());
		return false;
	}

	//Get File Size
	unsigned int nFileSize = ::GetFileSize(hFile, 0);

	//size must >= 4
	if(nFileSize < 4)
	{
		CloseHandle(hFile);
		return false;
	}

	//move to end
	if(INVALID_SET_FILE_POINTER == ::SetFilePointer(hFile, -4, 0, FILE_END))
	{
		setLastError(AXP_ERR_FILE_POINT, "File=%s, WinErr=%d", szFileName, ::GetLastError());
		CloseHandle(hFile);
		return false;
	}

	unsigned int nCRCRead;

	//Read Head
	DWORD dwReadBytes;
	if(!ReadFile(hFile, &nCRCRead, sizeof(nCRCRead), &dwReadBytes, 0) ||
		dwReadBytes != sizeof(nCRCRead))
	{
		setLastError(AXP_ERR_FILE_READ, "WinErr=%d", ::GetLastError());
		CloseHandle(hFile);
		return false;
	}
	CloseHandle(hFile); hFile=0;

	return nCRCRead == nCRC;
}

Exemplo n.º 2

Arquivo: AXPUtil.cpp Projeto: gitrider/wxsj2

//在文件尾部附上crc校验码
bool attachCRCFlag(const char* szFileName)
{
	assert(szFileName);
	if(!szFileName || szFileName[0] == 0) 
	{
		setLastError(AXP_ERR_PARAM);
		return 0;
	}

	//计算文件校验码
	unsigned int nCRC;
	if(!crcFile32(szFileName, nCRC)) return false;

	//打开该文件
	HANDLE hFile = ::CreateFile(szFileName, 
						GENERIC_READ|GENERIC_WRITE,
						FILE_SHARE_READ|FILE_SHARE_WRITE,
						0,
						OPEN_EXISTING,
						FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_SEQUENTIAL_SCAN,
						0);

	if(hFile == INVALID_HANDLE_VALUE)
	{
		setLastError(AXP_ERR_FILE_ACCESS, "File=%s, WinErr=%d", szFileName, ::GetLastError());
		return false;
	}

	//move to end
	if(INVALID_SET_FILE_POINTER == ::SetFilePointer(hFile, 0, 0, FILE_END))
	{
		setLastError(AXP_ERR_FILE_POINT, "File=%s, WinErr=%d", szFileName, ::GetLastError());
		CloseHandle(hFile);
		return false;
	}

	//write crc
	DWORD dwBytesWrite;
	if(!WriteFile(hFile, &nCRC, sizeof(nCRC), &dwBytesWrite, 0) || 
		dwBytesWrite != sizeof(nCRC))
	{
		setLastError(AXP_ERR_FILE_WRITE, "winErr: %d", GetLastError());
		CloseHandle(hFile);
		return false;
	}

	CloseHandle(hFile); hFile=0;
	return true;
}

Exemplo n.º 3

Arquivo: AxpUpdater.cpp Projeto: jjiezheng/pap_full

//检测一个文件的crc校验码
bool Updater::crcFile(const char* szFilename, unsigned int &dwCrc32, bool bIgnoreTail)
{
	return crcFile32(szFilename, dwCrc32, bIgnoreTail);
}

Exemplo n.º 4

Arquivo: AXPPackMaker.cpp Projeto: jjiezheng/pap_full

//将加入的文件保存成pak文件,
bool PakMaker::savePakFile(const char* szPakFileName, AXP_PAKMAKER_SAVECALLBACK callbackFunc)
{
	assert(szPakFileName);
	if(!szPakFileName || szPakFileName[0]==0)
	{
		setLastError(AXP_ERR_PARAM);
		return false;
	}

	//Pak文件
	PackFile pakFile;
	if(!pakFile.createNewPakFile(szPakFileName)) return false;

	//最终文件数
	int nActFileCount = 0;
	//最终文件crc
	unsigned int nTotalCRC = 0xFFFFFFFF;

	//加入文件
	FileNodeBuf::iterator it;
	for(it=m_AllFiles.begin(); it!=m_AllFiles.end(); it++)
	{
		FileNode& file = it->second;
		
		char szTempFileName[1024] = {0};

		if(callbackFunc)
		{
			//调用Callback
			if(!callbackFunc(file.strFileInDisk.c_str(), file.strFileInPak.c_str(), szTempFileName, 1024)) 
			{
				//从列表中删除
				file.bExcute = true;
				continue;
			}
		}
		else
		{
			strncpy(szTempFileName, file.strFileInDisk.c_str(), 1024);
		}

		file.strFileInDisk = szTempFileName;
		if(!crcFile32(szTempFileName, file.nCRC)) return false;
		file.nFileSize = getDiskFileSize(szTempFileName);

		if(!pakFile.insertContents(szTempFileName, 0, file.strFileInPak.c_str(), 
						AC_DISKFILE, false))
		{
			return false;
		}

		nActFileCount++;
		nTotalCRC ^= file.nCRC;
	}

	//生成(list)文件
	std::string strListFile;
	if(!_genrateListFile(strListFile, nActFileCount, nTotalCRC)) return false;

	//加入(list)文件
	if(!pakFile.insertContents(strListFile.c_str(), 0, PackFile::LIST_FILENAME,
					AC_DISKFILE, false))
	{
		return false;
	}

	//删除临时的temp文件
	::DeleteFile(strListFile.c_str());

	pakFile.closePakFile();

	return true;
}