DOS路径与NT路径转换(Win32, C++)

#include 
#include 
#include 
 
#ifdef _UNICODE
using _tstring = std::wstring;
#else
using _tstring = std::string;
#endif
 
_tstring DosPathToNtPath(const _tstring& strPath)
{
    _tstring strResultPath;
    TCHAR szDriveStrings[MAX_PATH] = { 0 };
    TCHAR szDosBuf[MAX_PATH] = { 0 };
    TCHAR szResultBuf[MAX_PATH] = { 0 };
    LPTSTR pDriveStr = NULL;
 
    // 获取盘符名到缓冲
    if (::GetLogicalDriveStrings(_countof(szDriveStrings), szDriveStrings))
    {
        // 遍历盘符名
        for (int i = 0; i < _countof(szDriveStrings); i += 4)
        {
            pDriveStr = &szDriveStrings[i];
            pDriveStr[2] = _T('\0');
 
            // 查询盘符对应的DOS设备名称
            if (!::QueryDosDevice(pDriveStr, szDosBuf, _countof(szDosBuf)))
            {
                break;
            }
 
            // 对比路径前缀
            size_t nLen = _tcslen(szDosBuf);
            if (0 == _tcsnicmp(strPath.c_str(), szDosBuf, nLen))
            {
                lstrcpy(szResultBuf, pDriveStr);
                lstrcat(szResultBuf, strPath.c_str() + nLen);
                strResultPath = szResultBuf;
                break;
            }
        }
    }
 
    return strResultPath;
}
 
_tstring NtPathToDosPath(const _tstring& strPath)
{
    _tstring strResultPath;
    TCHAR szDriveStrings[MAX_PATH] = { 0 };
    TCHAR szDosBuf[MAX_PATH] = { 0 };
    TCHAR szResultBuf[MAX_PATH] = { 0 };
    LPTSTR pDriveStr = NULL;
 
    // 获取盘符名到缓冲
    if (::GetLogicalDriveStrings(_countof(szDriveStrings), szDriveStrings))
    {
        // 遍历盘符名
        for (int i = 0; i < _countof(szDriveStrings); i += 4)
        {
            pDriveStr = &szDriveStrings[i];
            pDriveStr[2] = _T('\0');
 
            // 查询盘符对应的DOS设备名称
            if (!::QueryDosDevice(pDriveStr, szDosBuf, _countof(szDosBuf)))
            {
                break;
            }
 
            // 对比路径前缀
            size_t nLen = _tcslen(pDriveStr);
            if (0 == _tcsnicmp(strPath.c_str(), pDriveStr, nLen))
            {
                lstrcpy(szResultBuf, szDosBuf);
                lstrcat(szResultBuf, strPath.c_str() + nLen);
                strResultPath = szResultBuf;
                break;
            }
        }
    }
 
    return strResultPath;
}
 
int main()
{
    TCHAR szCurPath[MAX_PATH] = { 0 };
    ::GetModuleFileName(NULL, szCurPath, _countof(szCurPath));
 
    _tstring strDosPath;
    _tstring strNtPath = szCurPath;
 
    strDosPath = NtPathToDosPath(strNtPath);
    strNtPath = DosPathToNtPath(strDosPath);
 
    return 0;
}