Question

我收到编译器错误_T标识符未找到..请帮我解决此错误？另外我想在C ??制作这个程序。但首先解决错误，以便我可以调试和观察流量？在VS 2008上进行编译

#include <iostream>
#include <fstream>
using namespace std;

typedef unsigned long ULONG;

typedef struct _EVENTLOGHEADER {
ULONG HeaderSize;
ULONG Signature;
ULONG MajorVersion;
ULONG MinorVersion;
ULONG StartOffset;
ULONG EndOffset;
ULONG CurrentRecordNumber;
ULONG OldestRecordNumber;
ULONG MaxSize;
ULONG Flags;
ULONG Retention;
ULONG EndHeaderSize;
} EVENTLOGHEADER, *PEVENTLOGHEADER;  

typedef unsigned long DWORD;
typedef unsigned short WORD;
typedef struct _EVENTLOGRECORD {
    DWORD Length;
    DWORD Reserved;
    DWORD RecordNumber;
    DWORD TimeGenerated;
    DWORD TimeWritten;
    DWORD EventID;
    WORD  EventType;
    WORD  NumStrings;
    WORD  EventCategory;
    WORD  ReservedFlags;
    DWORD ClosingRecordNumber;
    DWORD StringOffset;
    DWORD UserSidLength;
    DWORD UserSidOffset;
    DWORD DataLength;
    DWORD DataOffset;
} EVENTLOGRECORD, *PEVENTLOGRECORD;

void main()
{
    ifstream file;
    file.open("C:\Windows\System32\winevt\Logs\\Application.evtx",ios::in|ios::binary);

    if(file.is_open()){
        _EVENTLOGHEADER logheader;
        _EVENTLOGRECORD logRecord;

        //Reading the header
        file.read((char*)&logheader,sizeof(_EVENTLOGHEADER));

        int startOfLog;
        //Loop on every record
        for(unsigned int numberFile=0;numberFile < logheader.CurrentRecordNumber -1;numberFile++){
            //Save the position
            startOfLog = file.tellg();
            //Read log record
            file.read((char*)&logRecord,sizeof(_EVENTLOGRECORD));

            /*******************************************************
            Here are the other information (section 'Remarks' on the 'EVENTLOGRECORD structure' link 
            ********************************************************/

            //Reading sourcename
            wchar_t buffData;
            wstring SourceName;
            file.read((char*)&buffData,sizeof(wchar_t));
            while(buffData!=_T('\0')){
                SourceName.push_back(buffData);
                file.read((char*)&buffData,sizeof(wchar_t));
            }

            //Reading computer name
            wstring ComputerName;
            file.read((char*)&buffData,sizeof(wchar_t));
            while(buffData!=_T('\0')){
                ComputerName.push_back(buffData);
                file.read((char*)&buffData,sizeof(wchar_t));
            }

            //Sets the position to the SID offset 
            int readCursor = startOfLog + logRecord.UserSidOffset;
            file.seekg(readCursor);

            char * userSid = NULL;
            if(logRecord.UserSidLength != 0)
            {
                userSid = (PCHAR)malloc(logRecord.UserSidLength);
                file.read(userSid,logRecord.UserSidLength); //Reading the sid
                //Here you can work on the SiD (but you need win32 API).If you need it, I could show you how i deal with this sid 
                free(userSid);
            }

            //Sets the position to the Strings offset
            readCursor = startOfLog + logRecord.StringOffset;
            file.seekg(readCursor);
            wstring buffString;
            vector<wstring> allStrings;
            //Reading all the strings
            for(int i=0; i< logRecord.NumStrings; i++) {
                file.read((char*)&buffData,sizeof(wchar_t));
                while(buffData!=_T('\0')){
                    buffString.push_back(buffData);
                    file.read((char*)&buffData,sizeof(wchar_t));
                }
                allStrings.push_back(buffString);
                buffString.clear();
            }

            //Sets the position to the Data offset
            readCursor = startOfLog + logRecord.DataOffset;
            file.seekg(readCursor);
            unsigned char *Data = (unsigned char *)malloc(logRecord.DataLength*sizeof(unsigned char));
            file.read((char*)Data,logRecord.DataLength); //Lecture des données

            //Sets the position to the end of log offset
            readCursor = startOfLog + logRecord.Length - sizeof(DWORD) ;
            file.seekg(readCursor);
            DWORD length;
            file.read((char*)&length,sizeof(DWORD));

            //Do what you want with the log record

            //Clean before reading next log
            ComputerName.clear();
            SourceName.clear();
            allStrings.clear();
            free(Data);
    }
}
}

Answer 1

_T是一种特定于Windows的方法，用于指定窄字符常量/字符串文字，或宽字符常量/字符串文字，具体取决于项目设置。它需要在代码中不存在的适当#include指令，它不是编译器定义的宏。

但是，你不需要它。您在while(buffData!=_T('\0'))中使用它，但buffData的类型为wchar_t，与项目设置无关。在这种情况下，只需使用宽字符常量：L'\0'。

Answer 2

在_T中定义了Tchar.h宏，因此您似乎只需要包含该标头。

也就是说，您似乎没有编写可以作为ANSI和Unicode编译器的代码，因此停止使用TCHAR并使用L为宽字符添加前缀更有意义。所以，不要写_T('\0')写L'\0'，或者只写简单的0。

尝试读取evtx文件时编译错误？

2 个答案: