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Diffstat (limited to 'src/config/Block.hxx')
-rw-r--r-- | src/config/Block.hxx | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/src/config/Block.hxx b/src/config/Block.hxx new file mode 100644 index 000000000..9e72018ca --- /dev/null +++ b/src/config/Block.hxx @@ -0,0 +1,130 @@ +/* + * 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_BLOCK_HXX +#define MPD_CONFIG_BLOCK_HXX + +#include "check.h" +#include "Param.hxx" +#include "Compiler.h" + +#include <string> +#include <vector> + +class Error; +class AllocatedPath; + +struct BlockParam { + std::string name; + std::string value; + int line; + + /** + * This flag is false when nobody has queried the value of + * this option yet. + */ + mutable bool used; + + gcc_nonnull_all + BlockParam(const char *_name, const char *_value, int _line=-1) + :name(_name), value(_value), line(_line), used(false) {} + + gcc_pure + int GetIntValue() const; + + gcc_pure + unsigned GetUnsignedValue() const; + + gcc_pure + bool GetBoolValue() const; +}; + +struct ConfigBlock { + /** + * The next #ConfigBlock with the same name. The destructor + * deletes the whole chain. + */ + ConfigBlock *next; + + int line; + + std::vector<BlockParam> block_params; + + /** + * This flag is false when nobody has queried the value of + * this option yet. + */ + bool used; + + explicit ConfigBlock(int _line=-1) + :next(nullptr), line(_line), used(false) {} + + ConfigBlock(const ConfigBlock &) = delete; + + ~ConfigBlock(); + + ConfigBlock &operator=(const ConfigBlock &) = 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 < 0; + } + + gcc_pure + bool IsEmpty() const { + return block_params.empty(); + } + + 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 |