Lucas Eckels | 8a58cac | 2012-08-06 15:12:54 -0700 | [diff] [blame^] | 1 | // -*- C++ -*- |
| 2 | // $Id: io_decorators.h,v 1.5 2002/07/02 22:10:51 t1mpy Exp $ |
| 3 | |
| 4 | // id3lib: a software library for creating and manipulating id3v1/v2 tags |
| 5 | // Copyright 1999, 2000 Scott Thomas Haug |
| 6 | |
| 7 | // This library is free software; you can redistribute it and/or modify it |
| 8 | // under the terms of the GNU Library General Public License as published by |
| 9 | // the Free Software Foundation; either version 2 of the License, or (at your |
| 10 | // option) any later version. |
| 11 | // |
| 12 | // This library is distributed in the hope that it will be useful, but WITHOUT |
| 13 | // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 14 | // FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public |
| 15 | // License for more details. |
| 16 | // |
| 17 | // You should have received a copy of the GNU Library General Public License |
| 18 | // along with this library; if not, write to the Free Software Foundation, |
| 19 | // Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 20 | |
| 21 | // The id3lib authors encourage improvements and optimisations to be sent to |
| 22 | // the id3lib coordinator. Please see the README file for details on where to |
| 23 | // send such submissions. See the AUTHORS file for a list of people who have |
| 24 | // contributed to id3lib. See the ChangeLog file for a list of changes to |
| 25 | // id3lib. These files are distributed with id3lib at |
| 26 | // http://download.sourceforge.net/id3lib/ |
| 27 | |
| 28 | #ifndef _ID3LIB_READER_DECORATORS_H_ |
| 29 | #define _ID3LIB_READER_DECORATORS_H_ |
| 30 | |
| 31 | #include "readers.h" |
| 32 | #include "io_helpers.h" |
| 33 | #include "id3/utils.h" // has <config.h> "id3/id3lib_streams.h" "id3/globals.h" "id3/id3lib_strings.h" |
| 34 | |
| 35 | namespace dami |
| 36 | { |
| 37 | namespace io |
| 38 | { |
| 39 | /** |
| 40 | * Set a window on the buffer. Characters can only be read within this |
| 41 | * window. |
| 42 | */ |
| 43 | class ID3_CPP_EXPORT WindowedReader : public ID3_Reader |
| 44 | { |
| 45 | typedef ID3_Reader SUPER; |
| 46 | |
| 47 | ID3_Reader& _reader; |
| 48 | pos_type _beg, _end; |
| 49 | |
| 50 | bool inWindow(pos_type cur) |
| 51 | { return this->getBeg() <= cur && cur < this->getEnd(); } |
| 52 | |
| 53 | public: |
| 54 | explicit WindowedReader(ID3_Reader& reader) |
| 55 | : _reader(reader), _beg(reader.getBeg()), _end(reader.getEnd()) { ; } |
| 56 | |
| 57 | WindowedReader(ID3_Reader& reader, size_type size) |
| 58 | : _reader(reader), _beg(reader.getBeg()), _end(reader.getEnd()) |
| 59 | { this->setWindow(this->getCur(), size); } |
| 60 | |
| 61 | WindowedReader(ID3_Reader& reader, pos_type beg, size_type size) |
| 62 | : _reader(reader), _beg(reader.getBeg()), _end(reader.getEnd()) |
| 63 | { this->setWindow(beg, size); } |
| 64 | |
| 65 | void setWindow(pos_type beg, size_type size); |
| 66 | |
| 67 | pos_type setBeg(pos_type); |
| 68 | pos_type setCur(pos_type cur) |
| 69 | { |
| 70 | return _reader.setCur(mid(this->getBeg(), cur, this->getEnd())); |
| 71 | } |
| 72 | pos_type setEnd(pos_type); |
| 73 | |
| 74 | pos_type getCur() { return _reader.getCur(); } |
| 75 | pos_type getBeg() { return _beg; } |
| 76 | pos_type getEnd() { return _end; } |
| 77 | |
| 78 | bool inWindow() { return this->inWindow(this->getCur()); } |
| 79 | |
| 80 | int_type readChar(); |
| 81 | int_type peekChar(); |
| 82 | |
| 83 | size_type readChars(char_type buf[], size_type len); |
| 84 | size_type readChars(char buf[], size_type len) |
| 85 | { |
| 86 | return this->readChars((char_type*) buf, len); |
| 87 | } |
| 88 | |
| 89 | void close() { ; } |
| 90 | }; |
| 91 | |
| 92 | class ID3_CPP_EXPORT CharReader : public ID3_Reader |
| 93 | { |
| 94 | typedef ID3_Reader SUPER; |
| 95 | |
| 96 | protected: |
| 97 | ID3_Reader& _reader; |
| 98 | |
| 99 | public: |
| 100 | |
| 101 | CharReader(ID3_Reader& reader) : _reader(reader) { } |
| 102 | virtual ~CharReader() { ; } |
| 103 | |
| 104 | /** |
| 105 | * Read \c len characters into the array \c buf. Since the stream needs |
| 106 | * might have been unsynced, this function copies the characters one at a |
| 107 | * time. |
| 108 | */ |
| 109 | size_type readChars(char_type buf[], size_type len); |
| 110 | size_type readChars(char buf[], size_type len) |
| 111 | { |
| 112 | return this->readChars((char_type*) buf, len); |
| 113 | } |
| 114 | |
| 115 | void close() { ; } |
| 116 | int_type peekChar() { return _reader.peekChar(); } |
| 117 | |
| 118 | pos_type getBeg() { return _reader.getBeg(); } |
| 119 | pos_type getCur() { return _reader.getCur(); } |
| 120 | pos_type getEnd() { return _reader.getEnd(); } |
| 121 | |
| 122 | pos_type setCur(pos_type cur) { return _reader.setCur(cur); } |
| 123 | }; |
| 124 | |
| 125 | |
| 126 | class ID3_CPP_EXPORT LineFeedReader : public CharReader |
| 127 | { |
| 128 | typedef CharReader SUPER; |
| 129 | |
| 130 | public: |
| 131 | LineFeedReader(ID3_Reader& reader) : SUPER(reader) { ; } |
| 132 | int_type readChar(); |
| 133 | }; |
| 134 | |
| 135 | class ID3_CPP_EXPORT UnsyncedReader : public CharReader |
| 136 | { |
| 137 | typedef CharReader SUPER; |
| 138 | |
| 139 | public: |
| 140 | UnsyncedReader(ID3_Reader& reader) : SUPER(reader) { } |
| 141 | int_type readChar(); |
| 142 | }; |
| 143 | |
| 144 | class ID3_CPP_EXPORT CompressedReader : public ID3_MemoryReader |
| 145 | { |
| 146 | char_type* _uncompressed; |
| 147 | public: |
| 148 | CompressedReader(ID3_Reader& reader, size_type newSize); |
| 149 | virtual ~CompressedReader(); |
| 150 | }; |
| 151 | |
| 152 | class ID3_CPP_EXPORT UnsyncedWriter : public ID3_Writer |
| 153 | { |
| 154 | typedef ID3_Writer SUPER; |
| 155 | |
| 156 | ID3_Writer& _writer; |
| 157 | int_type _last; |
| 158 | size_type _numSyncs; |
| 159 | |
| 160 | public: |
| 161 | UnsyncedWriter(ID3_Writer& writer) |
| 162 | : _writer(writer), _last('\0'), _numSyncs(0) |
| 163 | { ; } |
| 164 | |
| 165 | size_type getNumSyncs() const { return _numSyncs; } |
| 166 | int_type writeChar(char_type ch); |
| 167 | void flush(); |
| 168 | |
| 169 | /** |
| 170 | * Write \c len characters into the array \c buf. Since the stream needs |
| 171 | * might have been unsynced, this function copies the characters one at a |
| 172 | * time. |
| 173 | */ |
| 174 | size_type writeChars(const char_type[], size_type len); |
| 175 | size_type writeChars(const char buf[], size_type len) |
| 176 | { |
| 177 | return this->writeChars(reinterpret_cast<const char_type *>(buf), len); |
| 178 | } |
| 179 | |
| 180 | void close() { ; } |
| 181 | |
| 182 | pos_type getBeg() { return _writer.getBeg(); } |
| 183 | pos_type getCur() { return _writer.getCur(); } |
| 184 | pos_type getEnd() { return _writer.getEnd(); } |
| 185 | }; |
| 186 | |
| 187 | class CompressedWriter : public ID3_Writer |
| 188 | { |
| 189 | typedef ID3_Writer SUPER; |
| 190 | |
| 191 | ID3_Writer& _writer; |
| 192 | BString _data; |
| 193 | size_type _origSize; |
| 194 | public: |
| 195 | |
| 196 | explicit CompressedWriter(ID3_Writer& writer) |
| 197 | : _writer(writer), _data(), _origSize(0) |
| 198 | { ; } |
| 199 | virtual ~CompressedWriter() { this->flush(); } |
| 200 | |
| 201 | size_type getOrigSize() const { return _origSize; } |
| 202 | |
| 203 | void flush(); |
| 204 | |
| 205 | size_type writeChars(const char_type buf[], size_type len); |
| 206 | size_type writeChars(const char buf[], size_type len) |
| 207 | { |
| 208 | return this->writeChars(reinterpret_cast<const char_type*>(buf), len); |
| 209 | } |
| 210 | |
| 211 | pos_type getCur() { return _data.size(); } |
| 212 | void close() { ; } |
| 213 | }; |
| 214 | }; |
| 215 | }; |
| 216 | |
| 217 | #endif /* _ID3LIB_READER_DECORATORS_H_ */ |
| 218 | |