| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| #ifndef CSV_BSTREAM_HXX |
| #define CSV_BSTREAM_HXX |
| |
| #include <string.h> |
| #include <cosv/string.hxx> |
| |
| |
| namespace csv |
| { |
| |
| |
| enum seek_dir |
| { |
| beg = 0, |
| cur = 1, |
| end = 2 |
| }; |
| |
| |
| class bistream |
| { |
| public: |
| // LIFECYCLE |
| virtual ~bistream() {} |
| |
| // OPERATIONS |
| /// @return Number of actually read bytes. |
| uintt read( |
| void * out_pDest, |
| uintt i_nNrofBytes); |
| // INQUIRY |
| /** @return True, if already one try to read had failed. |
| There is no guarantee, that it returns true, if end of data |
| is just reached. |
| Though it will return false, if there is still somemething |
| to read. |
| */ |
| bool eod() const; |
| |
| private: |
| virtual uintt do_read( |
| void * out_pDest, |
| uintt i_nNrofBytes) = 0; |
| virtual bool inq_eod() const = 0; |
| }; |
| |
| |
| class bostream |
| { |
| public: |
| // LIFECYCLE |
| virtual ~bostream() {} |
| |
| // OPERATIONS |
| /// @return Number of actually written bytes. |
| uintt write( |
| const void * i_pSrc, |
| uintt i_nNrofBytes); |
| /// @return Number of actually written bytes. |
| uintt write( |
| const char * i_pSrc ); |
| /// @return Number of actually written bytes. |
| uintt write( |
| const String & i_pSrc ); |
| private: |
| virtual uintt do_write( |
| const void * i_pSrc, |
| uintt i_nNrofBytes) = 0; |
| }; |
| |
| |
| class bstream : public bistream, |
| public bostream |
| { |
| public: |
| uintt seek( |
| intt i_nDistanceFromBegin, |
| seek_dir i_eStartPoint = ::csv::beg ); |
| uintt position() const; |
| |
| private: |
| virtual uintt do_seek( |
| intt i_nDistance, |
| seek_dir i_eStartPoint = ::csv::beg ) = 0; |
| virtual uintt inq_position() const = 0; |
| }; |
| |
| |
| // IMPLEMENTATION |
| inline uintt |
| bistream::read( void * o_pDest, |
| uintt i_nNrofBytes) |
| { return do_read(o_pDest, i_nNrofBytes); } |
| inline bool |
| bistream::eod() const |
| { return inq_eod(); } |
| |
| inline uintt |
| bostream::write( const void * i_pSrc, |
| uintt i_nNrofBytes) |
| { return do_write( i_pSrc, i_nNrofBytes ); } |
| inline uintt |
| bostream::write( const char * i_sSrc ) |
| { return write( i_sSrc, strlen(i_sSrc) ); } |
| inline uintt |
| bostream::write( const String & i_sSrc ) |
| { return write( i_sSrc.c_str(), i_sSrc.length() ); } |
| |
| inline uintt |
| bstream::seek( intt i_nDistance, |
| seek_dir i_eStartPoint ) |
| { return do_seek( i_nDistance, i_eStartPoint ); } |
| inline uintt |
| bstream::position() const |
| { return inq_position(); } |
| |
| |
| |
| } // namespace csv |
| |
| |
| #endif |
| |