127 lines
3.0 KiB
C++
127 lines
3.0 KiB
C++
/*
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* Copyright (C) 2003-2014 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "StateFile.hxx"
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#include "OutputState.hxx"
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#include "PlaylistState.hxx"
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#include "fs/TextFile.hxx"
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#include "Partition.hxx"
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#include "Volume.hxx"
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#include "fs/FileSystem.hxx"
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#include "util/Domain.hxx"
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#include "Log.hxx"
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#include <string.h>
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static constexpr Domain state_file_domain("state_file");
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StateFile::StateFile(AllocatedPath &&_path,
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Partition &_partition, EventLoop &_loop)
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:TimeoutMonitor(_loop),
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path(std::move(_path)), path_utf8(path.ToUTF8()),
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partition(_partition),
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prev_volume_version(0), prev_output_version(0),
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prev_playlist_version(0)
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{
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}
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void
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StateFile::RememberVersions()
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{
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prev_volume_version = sw_volume_state_get_hash();
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prev_output_version = audio_output_state_get_version();
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prev_playlist_version = playlist_state_get_hash(partition.playlist,
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partition.pc);
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}
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bool
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StateFile::IsModified() const
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{
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return prev_volume_version != sw_volume_state_get_hash() ||
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prev_output_version != audio_output_state_get_version() ||
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prev_playlist_version != playlist_state_get_hash(partition.playlist,
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partition.pc);
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}
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void
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StateFile::Write()
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{
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FormatDebug(state_file_domain,
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"Saving state file %s", path_utf8.c_str());
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FILE *fp = FOpen(path, FOpenMode::WriteText);
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if (gcc_unlikely(!fp)) {
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FormatErrno(state_file_domain, "failed to create %s",
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path_utf8.c_str());
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return;
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}
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save_sw_volume_state(fp);
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audio_output_state_save(fp);
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playlist_state_save(fp, partition.playlist, partition.pc);
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fclose(fp);
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RememberVersions();
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}
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void
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StateFile::Read()
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{
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bool success;
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FormatDebug(state_file_domain, "Loading state file %s", path_utf8.c_str());
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TextFile file(path);
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if (file.HasFailed()) {
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FormatErrno(state_file_domain, "failed to open %s",
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path_utf8.c_str());
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return;
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}
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const char *line;
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while ((line = file.ReadLine()) != NULL) {
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success = read_sw_volume_state(line) ||
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audio_output_state_read(line) ||
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playlist_state_restore(line, file, partition.playlist,
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partition.pc);
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if (!success)
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FormatError(state_file_domain,
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"Unrecognized line in state file: %s",
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line);
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}
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RememberVersions();
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}
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void
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StateFile::CheckModified()
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{
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if (!IsActive() && IsModified())
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ScheduleSeconds(2 * 60);
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}
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void
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StateFile::OnTimeout()
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{
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Write();
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}
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