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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser 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 SETTINGS_HEADER
#define SETTINGS_HEADER
#include "irrlichttypes_bloated.h"
#include "util/string.h"
#include "jthread/jmutex.h"
#include <string>
#include <map>
#include <list>
#include <set>
enum ValueType
{
VALUETYPE_STRING,
VALUETYPE_FLAG // Doesn't take any arguments
};
struct ValueSpec
{
ValueSpec(ValueType a_type, const char *a_help=NULL)
{
type = a_type;
help = a_help;
}
ValueType type;
const char *help;
};
class Settings
{
public:
Settings() {}
Settings & operator += (const Settings &other);
Settings & operator = (const Settings &other);
/***********************
* Reading and writing *
***********************/
// Read configuration file. Returns success.
bool readConfigFile(const char *filename);
//Updates configuration file. Returns success.
bool updateConfigFile(const char *filename);
// NOTE: Types of allowed_options are ignored. Returns success.
bool parseCommandLine(int argc, char *argv[],
std::map<std::string, ValueSpec> &allowed_options);
bool parseConfigLines(std::istream &is, const std::string &end = "");
void writeLines(std::ostream &os) const;
/***********
* Getters *
***********/
std::string get(const std::string &name) const;
bool getBool(const std::string &name) const;
u16 getU16(const std::string &name) const;
s16 getS16(const std::string &name) const;
s32 getS32(const std::string &name) const;
u64 getU64(const std::string &name) const;
float getFloat(const std::string &name) const;
v2f getV2F(const std::string &name) const;
v3f getV3F(const std::string &name) const;
u32 getFlagStr(const std::string &name, const FlagDesc *flagdesc,
u32 *flagmask) const;
// N.B. if getStruct() is used to read a non-POD aggregate type,
// the behavior is undefined.
bool getStruct(const std::string &name, const std::string &format,
void *out, size_t olen) const;
// return all keys used
std::vector<std::string> getNames() const;
bool exists(const std::string &name) const;
/***************************************
* Getters that don't throw exceptions *
***************************************/
bool getNoEx(const std::string &name, std::string &val) const;
bool getFlag(const std::string &name) const;
bool getU16NoEx(const std::string &name, u16 &val) const;
bool getS16NoEx(const std::string &name, s16 &val) const;
bool getS32NoEx(const std::string &name, s32 &val) const;
bool getU64NoEx(const std::string &name, u64 &val) const;
bool getFloatNoEx(const std::string &name, float &val) const;
bool getV2FNoEx(const std::string &name, v2f &val) const;
bool getV3FNoEx(const std::string &name, v3f &val) const;
// N.B. getFlagStrNoEx() does not set val, but merely modifies it. Thus,
// val must be initialized before using getFlagStrNoEx(). The intention of
// this is to simplify modifying a flags field from a default value.
bool getFlagStrNoEx(const std::string &name, u32 &val, FlagDesc *flagdesc) const;
/***********
* Setters *
***********/
void set(const std::string &name, std::string value);
void set(const std::string &name, const char *value);
void setDefault(const std::string &name, std::string value);
void setBool(const std::string &name, bool value);
void setS16(const std::string &name, s16 value);
void setS32(const std::string &name, s32 value);
void setU64(const std::string &name, u64 value);
void setFloat(const std::string &name, float value);
void setV2F(const std::string &name, v2f value);
void setV3F(const std::string &name, v3f value);
void setFlagStr(const std::string &name, u32 flags,
const FlagDesc *flagdesc, u32 flagmask);
// N.B. if setStruct() is used to write a non-POD aggregate type,
// the behavior is undefined.
bool setStruct(const std::string &name, const std::string &format, void *value);
// remove a setting
bool remove(const std::string &name);
void clear();
void updateValue(const Settings &other, const std::string &name);
void update(const Settings &other);
private:
/***********************
* Reading and writing *
***********************/
bool parseConfigObject(std::istream &is,
std::string &name, std::string &value);
bool parseConfigObject(std::istream &is,
std::string &name, std::string &value,
const std::string &end, bool &end_found);
/*
* Reads a configuration object from stream (usually a single line)
* and adds it to dst.
* Preserves comments and empty lines.
* Setting names that were added to dst are also added to updated.
*/
void getUpdatedConfigObject(std::istream &is,
std::list<std::string> &dst,
std::set<std::string> &updated,
bool &changed);
void updateNoLock(const Settings &other);
void clearNoLock();
std::map<std::string, std::string> m_settings;
std::map<std::string, std::string> m_defaults;
// All methods that access m_settings/m_defaults directly should lock this.
mutable JMutex m_mutex;
};
#endif
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