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/*
* Copyright (C) 2003-2015 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_CONFIG_PARAM_HXX
#define MPD_CONFIG_PARAM_HXX
#include "Block.hxx"
#include "Compiler.h"
#include <string>
#include <vector>
class AllocatedPath;
class Error;
struct config_param {
/**
* The next config_param with the same name. The destructor
* deletes the whole chain.
*/
struct config_param *next;
std::string value;
unsigned int line;
std::vector<BlockParam> block_params;
/**
* This flag is false when nobody has queried the value of
* this option yet.
*/
bool used;
explicit config_param(int _line=-1)
:next(nullptr), line(_line), used(false) {}
gcc_nonnull_all
config_param(const char *_value, int _line=-1);
config_param(const config_param &) = delete;
~config_param();
config_param &operator=(const config_param &) = delete;
/**
* Determine if this is a "null" instance, i.e. an empty
* object that was synthesized and not loaded from a
* configuration file.
*/
bool IsNull() const {
return line == unsigned(-1);
}
gcc_nonnull_all
void AddBlockParam(const char *_name, const char *_value,
int _line=-1) {
block_params.emplace_back(_name, _value, _line);
}
gcc_nonnull_all gcc_pure
const BlockParam *GetBlockParam(const char *_name) const;
gcc_pure
const char *GetBlockValue(const char *name,
const char *default_value=nullptr) const;
/**
* Same as config_get_path(), but looks up the setting in the
* specified block.
*/
AllocatedPath GetBlockPath(const char *name, const char *default_value,
Error &error) const;
AllocatedPath GetBlockPath(const char *name, Error &error) const;
gcc_pure
int GetBlockValue(const char *name, int default_value) const;
gcc_pure
unsigned GetBlockValue(const char *name, unsigned default_value) const;
gcc_pure
bool GetBlockValue(const char *name, bool default_value) const;
};
#endif
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