时间处理函数

这两天在写个遍历文件批处理的小工具，碰到几个时间相关的函数，整理了下，说不定以后可能会再用到呢~

//判断文件是否存在
bool FileIsExists(LPCSTR filePath)
{
	WIN32_FIND_DATA FindFileData;
	HANDLE hFind;

	hFind = FindFirstFile(filePath, &FindFileData);

	if (hFind == INVALID_HANDLE_VALUE) 
	{
		return false;
	}
	
	FindClose(hFind);
	return true;
}

//获取文件最后修改时间距当前时间的差值（用于判断该文件是否正在写的一种方法）

time_t FileTimeToTime_t(FILETIME ft)  
{  
	ULARGE_INTEGER ui;  
	ui.LowPart = ft.dwLowDateTime;  
	ui.HighPart = ft.dwHighDateTime;  
	return ((LONGLONG)(ui.QuadPart - 116444736000000000) / 10000000);  
} 

time_t GetLastWriteTimeUntilNow(const std::string& fileName)
{
	WIN32_FIND_DATA ffd ;
	HANDLE hFind = FindFirstFile(fileName.c_str(),&ffd);
	SYSTEMTIME stUTC, stLastWriteTime;
	FileTimeToSystemTime(&(ffd.ftLastWriteTime), &stUTC);
	SystemTimeToTzSpecificLocalTime(NULL, &stUTC, &stLastWriteTime);
	
	SYSTEMTIME stCurrentTime;
	GetLocalTime(&stCurrentTime);	
	FILETIME fTime1;
	FILETIME fTime2
	SystemTimeToFileTime(&stLastWriteTime,&fTime1); 
	SystemTimeToFileTime(&stCurrentTime,&fTime2); 

	return (FileTimeToTime_t(fTime2) - FileTimeToTime_t(fTime1)); 
}

//遍历文件夹

int DirectoryList(LPCSTR Path,std::string paramFormart)
{
	WIN32_FIND_DATA FindData;
	HANDLE hError;
	int FileCount = 0;
	char FilePathName[LEN];
	// 构造路径
	char FullPathName[LEN];
	strcpy(FilePathName, Path);
	strcat(FilePathName, "\\*.*");
	hError = FindFirstFile(FilePathName, &FindData);
	if (hError == INVALID_HANDLE_VALUE)
	{
		printf("搜索失败!");
		return 0;
	}
	while(::FindNextFile(hError, &FindData))
	{
		// 过虑.和..
		if (strcmp(FindData.cFileName, ".") == 0 
			|| strcmp(FindData.cFileName, "..") == 0 )
		{
			continue;
		}

		// 构造完整路径
		wsprintf(FullPathName, "%s\\%s", Path,FindData.cFileName);

		if (FindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
		{
			DirectoryList(FullPathName,paramFormart);
		}
		else
		{
			FileCount++;
			//本级的文件;					
			std::string transformFile = FullPathName;
			std::string fileSuffix = transformFile.substr(transformFile.size() - 3, transformFile.size());
			std::string fileEnd = transformFile.substr(transformFile.size() - 7, transformFile.size());
			
			transformFile += ".mp4";

			if ( fileSuffix == "mp4" && fileEnd != "mp4.mp4" && !FileIsExists(transformFile.c_str()) )
			{
				time_t tTime = GetLastWriteTimeUntilNow(FullPathName);
				if (tTime < 60 && tTime > -60)
				{
					printf("[%s] 修改60秒内不做变动，稍后再试！\n",FullPathName);  
					continue;
				}

				//FILE* fp = fopen(FullPathName, " a+");
				//if(fp==NULL) //如果失败了   
				//{
				//	printf("[%s] 正在写，稍后再试！\n",FullPathName);  
				//	continue;
				//}

				//对该文件做一些业务操作
 				printf("Transform file: %s \n", FullPathName);	
				HINSTANCE hNewExe = ShellExecuteA(NULL, "open", "ffmpeg.exe", param , NULL, SW_SHOW);
			}						
		}
	}
	return 0;
}

时间处理函数,布布扣,bubuko.com

时间处理函数

原文：http://blog.csdn.net/longlong530/article/details/22918317