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/*
* 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_COMMAND_LIST_BUILDER_HXX
#define MPD_COMMAND_LIST_BUILDER_HXX
#include <glib.h>
#include <assert.h>
class CommandListBuilder {
/**
* for when in list mode
*/
GSList *cmd_list;
/**
* print OK after each command execution
*/
int cmd_list_OK;
/**
* mem cmd_list consumes
*/
size_t cmd_list_size;
public:
CommandListBuilder()
:cmd_list(nullptr), cmd_list_OK(-1), cmd_list_size(0) {}
~CommandListBuilder() {
Reset();
}
/**
* Is a command list currently being built?
*/
bool IsActive() const {
assert(cmd_list_OK >= -1 && cmd_list_OK <= 1);
return cmd_list_OK >= 0;
}
/**
* Is the object in "list_OK" mode?
*/
bool IsOKMode() const {
assert(IsActive());
return (bool)cmd_list_OK;
}
/**
* Reset the object: delete the list and clear the mode.
*/
void Reset();
/**
* Begin building a command list.
*/
void Begin(bool ok) {
assert(cmd_list == nullptr);
assert(cmd_list_OK == -1);
cmd_list_OK = (int)ok;
}
/**
* @return false if the list is full
*/
bool Add(const char *cmd);
/**
* Finishes the list and returns it.
*/
GSList *Commit() {
assert(IsActive());
/* for scalability reasons, we have prepended each new
command; now we have to reverse it to restore the
correct order */
return cmd_list = g_slist_reverse(cmd_list);
}
};
#endif
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