Windows C++ 非递归式（stack）深度优先遍历目录

 #include <Windows.h>
 #include <cstdio>
 #include <cstring>
 #include <string>
 #include <stack>

 typedef void (__stdcall *P_WALK_DIR_CALLBACK)(const std::string &In_strFilePath);

 int WalkDir(const char *In_pcRoot, P_WALK_DIR_CALLBACK In_pfunCallBack)
 {
     int         iRetVal = ;
     std::string strRoot;
     std::stack<std::string> stkDirs;

     if (In_pcRoot == NULL || In_pfunCallBack == NULL)
     {
         iRetVal = -;
         goto fun_ret;
     }

     strRoot = In_pcRoot;
     if (strRoot.empty())
     {
         iRetVal = -;
         goto fun_ret;
     }

     if (strRoot.back() != '\\' && strRoot.back() != '/')
         strRoot += '\\';
     stkDirs.push(strRoot);

     while (!stkDirs.empty())
     {
         std::string         strDirForWalk;
         WIN32_FIND_DATAA    Win32FindData   = {};
         HANDLE              hFindHandle     = NULL;

         strDirForWalk = stkDirs.top();
         stkDirs.pop();
         hFindHandle = FindFirstFileA((strDirForWalk + "*").c_str(), &Win32FindData);
         if (hFindHandle == INVALID_HANDLE_VALUE)
             continue;

         if (!(strlen(Win32FindData.cFileName) ==  && strncmp(Win32FindData.cFileName, ".", ) == )
             && !(strlen(Win32FindData.cFileName) ==  && strncmp(Win32FindData.cFileName, "..", ) == ))
         {
             if (Win32FindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
                 stkDirs.push(strDirForWalk + Win32FindData.cFileName + "\\");
             else
                 In_pfunCallBack(strDirForWalk + Win32FindData.cFileName);
         }
         while (FindNextFileA(hFindHandle, &Win32FindData))
         {
             if (!(strlen(Win32FindData.cFileName) ==  && strncmp(Win32FindData.cFileName, ".", ) == )
                 && !(strlen(Win32FindData.cFileName) ==  && strncmp(Win32FindData.cFileName, "..", ) == ))
             {
                 if (Win32FindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
                     stkDirs.push(strDirForWalk + Win32FindData.cFileName + "\\");
                 else
                     In_pfunCallBack(strDirForWalk + Win32FindData.cFileName);
             }
         }

         if (hFindHandle != INVALID_HANDLE_VALUE)
             FindClose(hFindHandle);
     }

 fun_ret:
     return iRetVal;
 }

 void inline __stdcall WalkDirCallBack(const std::string &In_strFilePath)
 {
     printf("%s\n", In_strFilePath.c_str());
     return;
 }

 void main(int argc, char **argv)
 {
     WalkDir(argv[], WalkDirCallBack);
     return;
 }