filesystem_traits.hpp

用STL的方式封装了WindowsAPI、COM调用、ACE、ATL、MFC、WTL等多种组件

    {
        return ::lstrcmpiA(s1, s2);
    }

    static size_type str_len(char_type const *src)
    {
        return static_cast<size_type>(::lstrlenA(src));
    }

    static char_type *str_chr(char_type const *s, char_type ch)
    {
        return const_cast<char_type*>(strchr(s, ch));
    }

    static char_type *str_rchr(char_type const *s, char_type ch)
    {
        return const_cast<char_type*>(strrchr(s, ch));
    }

    static char_type *str_str(char_type const *s, char_type const *sub)
    {
        return const_cast<char_type*>(strstr(s, sub));
    }

    // File-system entry names
    static char_type *ensure_dir_end(char_type *dir)
    {
        char_type       *end;
        char_type const separator = (NULL == strchr(dir, '/') && NULL != strchr(dir, '\\')) ? '\\' : '/';

        for(end = dir; *end != '\0'; ++end)
        {}

        if( dir < end &&
            *(end - 1) != separator)
        {
            *end        =   separator;
            *(end + 1)  =   '\0';
        }

        return dir;
    }

    static char_type *remove_dir_end(char_type *dir)
    {
        char_type   *end;

        for(end = dir; *end != '\0'; ++end)
        {}

        if( dir < end &&
            *(end - 1) == path_name_separator())
        {
            *(end - 1)  =   '\0';
        }

        return dir;
    }

    static bool_type has_dir_end(char_type const *dir)
    {
        is_size_t len = str_len(dir);

        return (0 < len) && path_name_separator() == dir[len - 1];
    }

    static bool_type is_dots(char_type const *dir)
    {
        return  dir != 0 &&
                dir[0] == '.' &&
                (   dir[1] == '\0' ||
                    (    dir[1] == '.' &&
                        dir[2] == '\0'));
    }

    static bool_type is_path_rooted(char_type const *path)
    {
        INETSTL_ASSERT(NULL != path);

        return '/' == *path;
    }

    static bool_type is_path_absolute(char_type const *path)
    {
        return is_path_rooted(path);
    }

    static char_type path_separator()
    {
        return ';';
    }

    static char_type path_name_separator()
    {
        return '/';
    }

    static char_type const *pattern_all()
    {
        return "*";
    }

    static is_dword_t get_full_path_name(HINTERNET hconn, char_type const *fileName, is_dword_t cchBuffer, char_type *buffer, char_type **ppFile)
    {
        INETSTL_ASSERT(0 == cchBuffer || NULL != buffer);
        INETSTL_ASSERT(NULL == buffer || 0 != cchBuffer);

        // Deduce the separator
        char_type const separator = (NULL == strchr(fileName, '/') && NULL != strchr(fileName, '\\')) ? '\\' : '/';
        char_type       fullPath[1 + _MAX_PATH];

        // If we're not rooted, then get the current directory and concatenate
        if(separator != *fileName)
        {
            is_size_t   cchBuffer   =   STLSOFT_NUM_ELEMENTS(fullPath);
            int         isDot       =   0 == str_compare(fileName, ".");

            if(!get_current_directory(hconn, cchBuffer, fullPath))
            {
                fullPath[0] = '\0';
            }
            if(!isDot)
            {
                ensure_dir_end(fullPath);
                str_cat(fullPath, fileName);
            }

            fileName = fullPath;
        }

        size_type       len =   str_len(fileName);

        if(NULL != buffer)
        {
            if(cchBuffer < len)
            {
                len = cchBuffer;
            }

            strncpy(buffer, fileName, cchBuffer);

            if(NULL != ppFile)
            {
                char_type const *pRSlash        =   strrchr(buffer, '/');
                char_type const *pRBackSlash    =   strrchr(buffer, '\\');

                if(pRSlash < pRBackSlash)
                {
                    pRSlash = pRBackSlash;
                }

                if(NULL == pRSlash)
                {
                    *ppFile = NULL;
                }
                else
                {
                    *ppFile = const_cast<char_type*>(pRSlash) + 1;
                }
            }
        }

        return len;
    }

    static is_dword_t get_full_path_name(HINTERNET hconn, char_type const *fileName, is_dword_t cchBuffer, char_type *buffer)
    {
        char_type *pFile;

        return get_full_path_name(hconn, fileName, cchBuffer, buffer, &pFile);
    }

    // Internet connectivity
    static HINTERNET internet_open(char_type const *agent, is_dword_t accessType, char_type const *proxy, char_type const *proxyBypass, is_dword_t flags)
    {
        return ::InternetOpenA(agent, accessType, proxy, proxyBypass, flags);
    }

    static HINTERNET internet_connect(HINTERNET hsess, char_type const *server, INTERNET_PORT port, char_type const *userName, char_type const *password, is_dword_t service, is_dword_t flags, is_dword_t context)
    {
        return ::InternetConnectA(hsess, server, port, userName, password, service, flags, context);
    }

    static void close_connection(HINTERNET hconn)
    {
        INETSTL_ASSERT(NULL != hconn);

        ::InternetCloseHandle(hconn);
    }

    // FindFile() API
    static HINTERNET find_first_file(HINTERNET hconn, char_type const *spec, find_data_type *findData, is_dword_t flags = 0, is_dword_t context = 0)
    {
        HINTERNET   hfind   =   ::FtpFindFirstFileA(hconn, spec, any_caster<find_data_type*, LPWIN32_FIND_DATAA, LPWIN32_FIND_DATAW>(findData), flags, context);

#if 0
        if(NULL == hfind)
        {
            findData->cFileName[0] = '\0';
        }

printf("find_first_file(0x%08x, %s => %s)\n", hfind, spec, findData->cFileName);
#endif /* 0 */

        return hfind;
    }

    static bool_type find_next_file(HANDLE h, find_data_type *findData)
    {
        return FALSE != ::InternetFindNextFileA(h, findData);
    }

    static void find_close(HINTERNET hfind)
    {
        INETSTL_ASSERT(NULL != hfind);

        ::InternetCloseHandle(hfind);
    }

    // File system state
    static bool_type set_current_directory(HINTERNET hconn, char_type const *dir)
    {
        return ::FtpSetCurrentDirectoryA(hconn, dir) != FALSE;
    }

    static bool_type get_current_directory(HINTERNET hconn, is_size_t &cchBuffer, char_type *buffer)
    {
        return FALSE != ::FtpGetCurrentDirectoryA(hconn, buffer, sap_cast<unsigned long*>(&cchBuffer));
    }

    static bool_type file_exists(HINTERNET hconn, char_type const *fileName)
    {
        find_data_type  data;
        HINTERNET       hfind = find_first_file(hconn, fileName, &data);

        return (NULL == hfind) ? false : (find_close(hfind), true);
    }

#if 0
    static bool_type    is_file(HINTERNET hconn, char_type const *path);
    static bool_type    is_directory(HINTERNET hconn, char_type const *path);
    static bool_type    stat(HINTERNET hconn, char_type const *path, stat_data_type *stat_data);
#endif /* 0 */

    static bool_type    is_file(stat_data_type const *stat_data)
    {
        return FILE_ATTRIBUTE_DIRECTORY != (stat_data->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
    }
    static bool_type    is_directory(stat_data_type const *stat_data)
    {
        return FILE_ATTRIBUTE_DIRECTORY == (stat_data->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
    }
    static bool_type    is_link(stat_data_type const *stat_data);
    static bool_type    is_readonly(stat_data_type const *stat_data)
    {
        return FILE_ATTRIBUTE_READONLY == (stat_data->dwFileAttributes & FILE_ATTRIBUTE_READONLY);
    }

    // File system control
    static bool_type create_directory(HINTERNET hconn, char_type const *dir)
    {
        return FALSE != ::FtpCreateDirectoryA(hconn, dir);
    }

    static bool_type remove_directory(HINTERNET hconn, char_type const *dir)
    {
        return FALSE != ::FtpRemoveDirectoryA(hconn, dir);
    }

    static bool_type delete_file(HINTERNET hconn, char_type const *file)
    {
        return FALSE != ::FtpDeleteFileA(hconn, file);
    }

    static bool_type rename_file(HINTERNET hconn, char_type const *currentName, char_type const *newName)
    {
        return FALSE != ::FtpRenameFileA(hconn, currentName, newName);
    }
};

STLSOFT_TEMPLATE_SPECIALISATION
struct filesystem_traits<is_char_w_t>
{
public:
    typedef is_char_w_t                     char_type;
    typedef is_size_t                       size_type;
    typedef is_ptrdiff_t                    difference_type;
    typedef WIN32_FIND_DATAW                find_data_type;
    typedef WIN32_FIND_DATAW                stat_data_type;
    typedef filesystem_traits<is_char_w_t>  class_type;
    typedef is_int_t                        int_type;
    typedef is_bool_t                       bool_type;
    typedef DWORD                           error_type;

public:
    // General string handling
    static char_type *str_copy(char_type *dest, char_type const *src)
    {
        return ::lstrcpyW(dest, src);
    }

    static char_type *str_n_copy(char_type *dest, char_type const *src, is_size_t cch)
    {
        return wcsncpy(dest, src, cch);
    }