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Diffstat (limited to 'src/cue/CueParser.hxx')
-rw-r--r-- | src/cue/CueParser.hxx | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/src/cue/CueParser.hxx b/src/cue/CueParser.hxx new file mode 100644 index 000000000..1266f1a6f --- /dev/null +++ b/src/cue/CueParser.hxx @@ -0,0 +1,128 @@ +/* + * Copyright (C) 2003-2013 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_CUE_PARSER_HXX +#define MPD_CUE_PARSER_HXX + +#include "check.h" +#include "gcc.h" + +class CueParser { + enum { + /** + * Parsing the CUE header. + */ + HEADER, + + /** + * Parsing a "FILE ... WAVE". + */ + WAVE, + + /** + * Ignore everything until the next "FILE". + */ + IGNORE_FILE, + + /** + * Parsing a "TRACK ... AUDIO". + */ + TRACK, + + /** + * Ignore everything until the next "TRACK". + */ + IGNORE_TRACK, + } state; + + struct tag *tag; + + char *filename; + + /** + * The song currently being edited. + */ + struct song *current; + + /** + * The previous song. It is remembered because its end_time + * will be set to the current song's start time. + */ + struct song *previous; + + /** + * A song that is completely finished and can be returned to + * the caller via cue_parser_get(). + */ + struct song *finished; + + /** + * Set to true after previous.end_time has been updated to the + * start time of the current song. + */ + bool last_updated; + + /** + * Tracks whether cue_parser_finish() has been called. If + * true, then all remaining (partial) results will be + * delivered by cue_parser_get(). + */ + bool end; + +public: + CueParser(); + ~CueParser(); + + /** + * Feed a text line from the CUE file into the parser. Call + * cue_parser_get() after this to see if a song has been finished. + */ + void Feed(const char *line); + + /** + * Tell the parser that the end of the file has been reached. Call + * cue_parser_get() after this to see if a song has been finished. + * This procedure must be done twice! + */ + void Finish(); + + /** + * Check if a song was finished by the last cue_parser_feed() or + * cue_parser_finish() call. + * + * @return a song object that must be freed by the caller, or NULL if + * no song was finished at this time + */ + struct song *Get(); + +private: + gcc_pure + struct tag *GetCurrentTag(); + + /** + * Commit the current song. It will be moved to "previous", + * so the next song may soon edit its end time (using the next + * song's start time). + */ + void Commit(); + + void Feed2(char *p); +}; + +#endif |