// stdafx.cpp : 只包括标准包含文件的源文件
// Test.pch 将作为预编译头
// stdafx.obj 将包含预编译类型信息

#include "stdafx.h"


void writelog(const TCHAR *format, ...)
{
	try
	{
		// 解析出日志路径;
		static TCHAR szlogpath[MAX_PATH] = {0};
		if ( szlogpath[0] == _T('\0') )
		{
			TCHAR szDrive[_MAX_DRIVE] = { 0 };
			TCHAR szDir[_MAX_DIR] = { 0 };
			TCHAR szFna[_MAX_DIR] = { 0 };
			TCHAR szExt[_MAX_DIR] = { 0 };
			TCHAR szModulePath[MAX_PATH] = {0};
			::GetModuleFileName(NULL, szModulePath, sizeof(szModulePath) / sizeof(TCHAR));
			_tsplitpath_s(szModulePath, szDrive, szDir, szFna, szExt);
			_tcscpy_s(szModulePath, szDrive);
			_tcscat_s(szModulePath, szDir);
			_stprintf_s(szlogpath, _T("%s日志\\%s.txt"), szModulePath, szFna);
		}

		// 打开或创建文件;
		CStdioFile fp;
		if (PathFileExists(szlogpath))
		{
			if (fp.Open(szlogpath, CFile::modeWrite) == FALSE)
			{
				return;
			}

			ULONGLONG length = fp.GetLength();
			if (length > 10 * 1024 * 1024) // 10M;
			{
				fp.Close();
				::DeleteFile(szlogpath);
				return;
			}
			fp.SeekToEnd();
		}
		else
		{
			fp.Open(szlogpath, CFile::modeCreate | CFile::modeWrite);
		}

		// 格式化前设置语言区域;
		TCHAR* old_locale = _tcsdup(_tsetlocale(LC_CTYPE, NULL));
		_tsetlocale(LC_CTYPE, _T("chs"));//设定中文;

		// 格式化日志内容;
		va_list		args = NULL;
		int			len = 0;
		TCHAR		*buffer = NULL;
		va_start( args, format );
		// _vscprintf doesn't count. terminating '\0'
		len = _vsctprintf( format, args )  + 1;
		buffer = (TCHAR*)malloc( len * sizeof(TCHAR) );
		_vstprintf_s( buffer, len, format, args ); // C4996
		// Note: vsprintf is deprecated; consider using vsprintf_s instead

		// 将日志内容输入到文件中;
		fp.WriteString( CTime::GetCurrentTime().Format(_T("%Y-%m-%d %H:%M:%S ")) );
		fp.WriteString(buffer);
		fp.WriteString(_T("\n"));

		// 关闭文件，释放资源并设置回原语言区域;
		free( buffer );
		_tsetlocale(LC_CTYPE, old_locale);
		free(old_locale);//还原区域设定;
		fp.Close();
	}
	catch (CException *e)
	{
		e->ReportError();
		e->Delete();
	}
}