mirror of https://github.com/minetest/minetest.git
251 lines
8.1 KiB
C++
251 lines
8.1 KiB
C++
/*
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Minetest
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Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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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 Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser 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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#pragma once
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#include "irrlichttypes_bloated.h"
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#include "util/string.h"
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#include <string>
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#include <list>
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#include <set>
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#include <mutex>
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class Settings;
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struct NoiseParams;
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// Global objects
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extern Settings *g_settings;
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extern std::string g_settings_path;
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// Type for a settings changed callback function
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typedef void (*SettingsChangedCallback)(const std::string &name, void *data);
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typedef std::vector<
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std::pair<
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SettingsChangedCallback,
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void *
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>
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> SettingsCallbackList;
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typedef std::unordered_map<std::string, SettingsCallbackList> SettingsCallbackMap;
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enum ValueType {
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VALUETYPE_STRING,
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VALUETYPE_FLAG // Doesn't take any arguments
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};
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enum SettingsParseEvent {
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SPE_NONE,
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SPE_INVALID,
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SPE_COMMENT,
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SPE_KVPAIR,
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SPE_END,
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SPE_GROUP,
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SPE_MULTILINE,
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};
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struct ValueSpec {
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ValueSpec(ValueType a_type, const char *a_help=NULL)
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{
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type = a_type;
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help = a_help;
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}
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ValueType type;
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const char *help;
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};
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struct SettingsEntry {
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SettingsEntry() = default;
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SettingsEntry(const std::string &value_) :
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value(value_)
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{}
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SettingsEntry(Settings *group_) :
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group(group_),
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is_group(true)
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{}
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std::string value = "";
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Settings *group = nullptr;
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bool is_group = false;
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};
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typedef std::unordered_map<std::string, SettingsEntry> SettingEntries;
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class Settings {
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public:
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Settings() = default;
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~Settings();
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Settings & operator += (const Settings &other);
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Settings & operator = (const Settings &other);
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/***********************
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* Reading and writing *
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***********************/
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// Read configuration file. Returns success.
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bool readConfigFile(const char *filename);
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//Updates configuration file. Returns success.
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bool updateConfigFile(const char *filename);
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// NOTE: Types of allowed_options are ignored. Returns success.
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bool parseCommandLine(int argc, char *argv[],
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std::map<std::string, ValueSpec> &allowed_options);
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bool parseConfigLines(std::istream &is, const std::string &end = "");
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void writeLines(std::ostream &os, u32 tab_depth=0) const;
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SettingsParseEvent parseConfigObject(const std::string &line,
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const std::string &end, std::string &name, std::string &value);
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bool updateConfigObject(std::istream &is, std::ostream &os,
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const std::string &end, u32 tab_depth=0);
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static bool checkNameValid(const std::string &name);
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static bool checkValueValid(const std::string &value);
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static std::string getMultiline(std::istream &is, size_t *num_lines=NULL);
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static void printEntry(std::ostream &os, const std::string &name,
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const SettingsEntry &entry, u32 tab_depth=0);
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/***********
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* Getters *
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***********/
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const SettingsEntry &getEntry(const std::string &name) const;
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const SettingsEntry &getEntryDefault(const std::string &name) const;
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Settings *getGroup(const std::string &name) const;
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const std::string &get(const std::string &name) const;
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const std::string &getDefault(const std::string &name) const;
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bool getBool(const std::string &name) const;
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u16 getU16(const std::string &name) const;
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s16 getS16(const std::string &name) const;
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u32 getU32(const std::string &name) const;
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s32 getS32(const std::string &name) const;
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u64 getU64(const std::string &name) const;
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float getFloat(const std::string &name) const;
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v2f getV2F(const std::string &name) const;
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v3f getV3F(const std::string &name) const;
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u32 getFlagStr(const std::string &name, const FlagDesc *flagdesc,
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u32 *flagmask) const;
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// N.B. if getStruct() is used to read a non-POD aggregate type,
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// the behavior is undefined.
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bool getStruct(const std::string &name, const std::string &format,
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void *out, size_t olen) const;
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bool getNoiseParams(const std::string &name, NoiseParams &np) const;
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bool getNoiseParamsFromValue(const std::string &name, NoiseParams &np) const;
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bool getNoiseParamsFromGroup(const std::string &name, NoiseParams &np) const;
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// return all keys used
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std::vector<std::string> getNames() const;
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bool exists(const std::string &name) const;
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/***************************************
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* Getters that don't throw exceptions *
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***************************************/
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bool getEntryNoEx(const std::string &name, SettingsEntry &val) const;
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bool getEntryDefaultNoEx(const std::string &name, SettingsEntry &val) const;
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bool getGroupNoEx(const std::string &name, Settings *&val) const;
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bool getNoEx(const std::string &name, std::string &val) const;
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bool getDefaultNoEx(const std::string &name, std::string &val) const;
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bool getFlag(const std::string &name) const;
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bool getU16NoEx(const std::string &name, u16 &val) const;
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bool getS16NoEx(const std::string &name, s16 &val) const;
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bool getS32NoEx(const std::string &name, s32 &val) const;
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bool getU64NoEx(const std::string &name, u64 &val) const;
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bool getFloatNoEx(const std::string &name, float &val) const;
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bool getV2FNoEx(const std::string &name, v2f &val) const;
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bool getV3FNoEx(const std::string &name, v3f &val) const;
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// Like other getters, but handling each flag individualy:
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// 1) Read default flags (or 0)
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// 2) Override using user-defined flags
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bool getFlagStrNoEx(const std::string &name, u32 &val,
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const FlagDesc *flagdesc) const;
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/***********
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* Setters *
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***********/
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// N.B. Groups not allocated with new must be set to NULL in the settings
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// tree before object destruction.
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bool setEntry(const std::string &name, const void *entry,
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bool set_group, bool set_default);
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bool set(const std::string &name, const std::string &value);
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bool setDefault(const std::string &name, const std::string &value);
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bool setGroup(const std::string &name, Settings *group);
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bool setGroupDefault(const std::string &name, Settings *group);
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bool setBool(const std::string &name, bool value);
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bool setS16(const std::string &name, s16 value);
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bool setU16(const std::string &name, u16 value);
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bool setS32(const std::string &name, s32 value);
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bool setU64(const std::string &name, u64 value);
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bool setFloat(const std::string &name, float value);
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bool setV2F(const std::string &name, v2f value);
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bool setV3F(const std::string &name, v3f value);
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bool setFlagStr(const std::string &name, u32 flags,
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const FlagDesc *flagdesc = nullptr, u32 flagmask = U32_MAX);
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bool setNoiseParams(const std::string &name, const NoiseParams &np,
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bool set_default=false);
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// N.B. if setStruct() is used to write a non-POD aggregate type,
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// the behavior is undefined.
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bool setStruct(const std::string &name, const std::string &format, void *value);
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// remove a setting
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bool remove(const std::string &name);
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void clear();
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void clearDefaults();
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void updateValue(const Settings &other, const std::string &name);
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void update(const Settings &other);
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/**************
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* Miscellany *
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**************/
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void setDefault(const std::string &name, const FlagDesc *flagdesc, u32 flags);
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const FlagDesc *getFlagDescFallback(const std::string &name) const;
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void registerChangedCallback(const std::string &name,
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SettingsChangedCallback cbf, void *userdata = NULL);
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void deregisterChangedCallback(const std::string &name,
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SettingsChangedCallback cbf, void *userdata = NULL);
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private:
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void updateNoLock(const Settings &other);
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void clearNoLock();
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void clearDefaultsNoLock();
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void doCallbacks(const std::string &name) const;
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SettingEntries m_settings;
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SettingEntries m_defaults;
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std::unordered_map<std::string, const FlagDesc *> m_flags;
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SettingsCallbackMap m_callbacks;
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mutable std::mutex m_callback_mutex;
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// All methods that access m_settings/m_defaults directly should lock this.
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mutable std::mutex m_mutex;
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};
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