读取unicode日志文件并清除记录的垃圾文件

//读取unicode文件，并清除记录的垃圾文件
//参数1:日志文件路径
bool ReadFilePath(const wchar_t *DataFilePath)
{
    wchar_t ChBuffer = L''; //将要从文件读取的单个字符
    wchar_t CleanFilePath[256] = L""; //将要清除的垃圾文件路径
    DWORD ReadNumber = 0; //已经读取的路径拥有的字符数量
    DWORD dwReadSize = 100;//已经读取多少数据

    HANDLE handle_File = CreateFile(DataFilePath,
                                    GENERIC_READ,
                                    0,
                                    NULL,
                                    OPEN_EXISTING,
                                    FILE_ATTRIBUTE_NORMAL,
                                    NULL);
        
        while(ReadFile(handle_File,&ChBuffer,2,&dwReadSize,NULL))
        {
            if(dwReadSize == 0)
            {
                wprintf(L"检测到文件结尾
");
                break;
            }

            if(ChBuffer == L'
')
                continue;
            if(ChBuffer == L'
')
            {
                CleanFilePath[ReadNumber] = L'';
                wprintf(L"已清除%s
",CleanFilePath);
                DeleteFile(CleanFilePath);
                ReadNumber = 0;
            }
            else
                CleanFilePath[ReadNumber++] = ChBuffer;

        }
    // 释放文件对象资源
    CloseHandle(handle_File) ;
}

 一开始因为不了解，使用了_wfopen_s,fgetwc系列函数，结果遇到了unicode文本乱码bug

然后通过，谷歌，msdn了解了，CreateFile,和ReadFile函数

使用CreateFile获取句柄，ReadFile读取文本中单个字符，并判断参数&dwReadSize是否为0来检测是否到了文件结尾

BOOL WINAPI ReadFile(
  _In_         HANDLE hFile, //文件句柄
  _Out_        LPVOID lpBuffer, //读写缓冲区
  _In_         DWORD nNumberOfBytesToRead, //读取多少数据
  _Out_opt_    LPDWORD lpNumberOfBytesRead,//已经读取了多少数据
  _Inout_opt_  LPOVERLAPPED lpOverlapped//异步读取结构
);

HANDLE hFile 文件句柄，通过CreateFile来获得
LPVOID lpBuffer 保存读取的字符
DWORD nNumberOfBytesToRead，一个wchar_t字符为2个数据
 LPDWORD lpNumberOfBytesRead, 为0时为文件结尾
LPOVERLAPPED lpOverlapped //一般为空