Exiv2

          @note This method should be only called after the concerned data (metadata)

                are all downloaded from the remote file to memory.

         */

        //@}

    protected:

#else

        virtual int seek(long offset, Position pos);

#endif

          @brief Allow direct access to the underlying data buffer. The buffer

                 is not protected against write access in any way, the argument

                 is ignored.

         */

        virtual byte* mmap(bool /*isWriteable*/ =false);

        virtual int munmap();

        //@}

        //! @name Accessors

     */

    EXIV2API long writeFile(const DataBuf& buf, const std::wstring& wpath);

#endif

      @brief replace each substring of the subject that matches the given search string with the given replacement.

      @return the subject after replacing.

     */

    EXIV2API std::string ReplaceStringInPlace(std::string subject, const std::string& search,

                          const std::string& replace);

#ifdef EXV_UNICODE_PATH

      @brief Like ReplaceStringInPlace() but accepts a unicode path in an std::wstring.

      @return the subject after replacing.

      @note This function is only available on Windows.

        struct StructStat {

            StructStat() : st_mode(0), st_size(0), st_nlink(0) {}

            mode_t  st_mode;            //!< Permissions

            nlink_t st_nlink;           //!< Number of hard links (broken on Windows, see winNumberOfLinks())

        };

// #endif

            if (0 == ret) {

                buf.st_size = st.st_size;

                buf.st_nlink = st.st_nlink;

            }

        }

        return ret;

            close();

            bool statOk = true;

            char* pf = 0;

#ifdef EXV_UNICODE_PATH

            std::wstring wspf;

            if (p_->stat(buf1) == -1) {

                statOk = false;

            }

#endif // !EXV_HAVE_LSTAT

            // MSVCRT rename that does not overwrite existing files

                    EXV_WARNING << Error(2, pf, strError(), "::stat") << "\n";

#endif

                }

                    // Set original file permissions

                    if (::chmod(pf, origStMode) == -1) {

#ifndef SUPPRESS_WARNINGS

#endif

                    }

                }

        } // if (fileIo)

        else {

            // Generic handling, reopen both to reset to start

        MemIo *memIo = dynamic_cast<MemIo*>(&src);

        if (memIo) {

            // Optimization if src is another instance of MemIo

                std::free(p_->data_);

            }

            p_->idx_ = 0;

    int MemIo::munmap()

    {

    }

    int MemIo::msync()

    {

#ifdef MS_SYNC

#else

#endif

    }