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- // -*- C++ -*-
- // $Id: readers.h,v 1.12 2002/06/29 17:43:42 t1mpy Exp $
-
- // id3lib: a software library for creating and manipulating id3v1/v2 tags
- // Copyright 1999, 2000 Scott Thomas Haug
-
- // This library is free software; you can redistribute it and/or modify it
- // under the terms of the GNU Library General Public License as published by
- // the Free Software Foundation; either version 2 of the License, or (at your
- // option) any later version.
- //
- // This library is distributed in the hope that it will be useful, but WITHOUT
- // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- // FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
- // License for more details.
- //
- // You should have received a copy of the GNU Library General Public License
- // along with this library; if not, write to the Free Software Foundation,
- // Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- // The id3lib authors encourage improvements and optimisations to be sent to
- // the id3lib coordinator. Please see the README file for details on where to
- // send such submissions. See the AUTHORS file for a list of people who have
- // contributed to id3lib. See the ChangeLog file for a list of changes to
- // id3lib. These files are distributed with id3lib at
- // http://download.sourceforge.net/id3lib/
-
- #ifndef _ID3LIB_READERS_H_
- #define _ID3LIB_READERS_H_
-
- #include "id3/id3lib_streams.h"
- #include "id3/reader.h"
-
- class ID3_CPP_EXPORT ID3_IStreamReader : public ID3_Reader
- {
- istream& _stream;
- protected:
- istream& getReader() const { return _stream; }
- public:
- ID3_IStreamReader(istream& reader) : _stream(reader) { ; }
- virtual ~ID3_IStreamReader() { ; }
- virtual void close() { ; }
-
- virtual int_type peekChar() { return _stream.peek(); }
-
- /** Read up to \c len chars into buf and advance the internal position
- ** accordingly. Returns the number of characters read into buf.
- **/
- virtual size_type readChars(char buf[], size_type len)
- {
- return this->readChars(reinterpret_cast<uchar *>(buf), len);
- }
- virtual size_type readChars(char_type buf[], size_type len)
- {
- _stream.read((char *)buf, len);
- return _stream.gcount();
- }
-
- virtual pos_type getBeg() { return 0; }
- virtual pos_type getCur() { return _stream.tellg(); }
- virtual pos_type getEnd()
- {
- pos_type cur = this->getCur();
- _stream.seekg(0, ios::end);
- pos_type end = this->getCur();
- this->setCur(cur);
- return end;
- }
-
- /** Set the value of the internal position for reading.
- **/
- virtual pos_type setCur(pos_type pos) { _stream.seekg(pos); return pos; }
- };
-
- class ID3_CPP_EXPORT ID3_IFStreamReader : public ID3_IStreamReader
- {
- ifstream& _file;
- public:
- ID3_IFStreamReader(ifstream& reader)
- : ID3_IStreamReader(reader), _file(reader) { ; }
-
- virtual void close()
- {
- _file.close();
- }
- };
-
- class ID3_CPP_EXPORT ID3_MemoryReader : public ID3_Reader
- {
- const char_type* _beg;
- const char_type* _cur;
- const char_type* _end;
- protected:
- void setBuffer(const char_type* buf, size_type size)
- {
- _beg = buf;
- _cur = buf;
- _end = buf + size;
- };
- public:
- ID3_MemoryReader()
- {
- this->setBuffer(NULL, 0);
- }
- ID3_MemoryReader(const char_type* buf, size_type size)
- {
- this->setBuffer(buf, size);
- };
- ID3_MemoryReader(const char* buf, size_type size)
- {
- this->setBuffer(reinterpret_cast<const char_type*>(buf), size);
- };
- virtual ~ID3_MemoryReader() { ; }
- virtual void close() { ; }
-
- virtual int_type peekChar()
- {
- if (!this->atEnd())
- {
- return *_cur;
- }
- return END_OF_READER;
- }
-
- /** Read up to \c len chars into buf and advance the internal position
- ** accordingly. Returns the number of characters read into buf.
- **/
- virtual size_type readChars(char buf[], size_type len)
- {
- return this->readChars(reinterpret_cast<char_type *>(buf), len);
- }
- virtual size_type readChars(char_type buf[], size_type len);
-
- virtual pos_type getCur()
- {
- return _cur - _beg;
- }
-
- virtual pos_type getBeg()
- {
- return _beg - _beg;
- }
-
- virtual pos_type getEnd()
- {
- return _end - _beg;
- }
-
- /** Set the value of the internal position for reading.
- **/
- virtual pos_type setCur(pos_type pos)
- {
- pos_type end = this->getEnd();
- size_type size = (pos < end) ? pos : end;
- _cur = _beg + size;
- return this->getCur();
- }
- };
-
- #endif /* _ID3LIB_READERS_H_ */
-
-