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 = 0;
    std::string strRoot;
    std::stack<std::string> stkDirs;

    if (In_pcRoot == NULL || In_pfunCallBack == NULL)
    {
        iRetVal = -1;
        goto fun_ret;
    }

    strRoot = In_pcRoot;
    if (strRoot.empty())
    {
        iRetVal = -2;
        goto fun_ret;
    }

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

    while (!stkDirs.empty())
    {
        std::string         strDirForWalk;
        WIN32_FIND_DATAA    Win32FindData   = {0};
        HANDLE              hFindHandle     = NULL;

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

        if (!(strlen(Win32FindData.cFileName) == 1 && strncmp(Win32FindData.cFileName, ".", 1) == 0)
            && !(strlen(Win32FindData.cFileName) == 2 && strncmp(Win32FindData.cFileName, "..", 2) == 0))
        {
            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) == 1 && strncmp(Win32FindData.cFileName, ".", 1) == 0)
                && !(strlen(Win32FindData.cFileName) == 2 && strncmp(Win32FindData.cFileName, "..", 2) == 0))
            {
                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[1], WalkDirCallBack);
    return;
}