118 lines
3.6 KiB
C++
118 lines
3.6 KiB
C++
/*
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Copyright (c) 2009-2010 Christopher A. Taylor. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of LibCat nor the names of its contributors may be used
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to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef CAT_SETTINGS_HPP
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#define CAT_SETTINGS_HPP
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#include <cat/Singleton.hpp>
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#include <cat/threads/Mutex.hpp>
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#include <fstream>
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namespace cat {
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enum SettingsValueFlags
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{
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CAT_SETTINGS_FILLED = 1, // s[] array has been set
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CAT_SETTINGS_INT = 2, // value has been promoted to int 'i'
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};
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struct SettingsValue
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{
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u8 flags; // sum of SettingsValueFlags
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char s[256]; // always nul-terminated
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int i;
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};
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class SettingsKey
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{
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public:
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SettingsKey(SettingsKey *lnode, SettingsKey *gnode, const char *name);
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~SettingsKey();
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public:
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SettingsKey *lnode, *gnode;
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char name[64]; // not necessarily nul-terminated
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SettingsValue value;
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public:
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void write(std::ofstream &file);
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};
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// User settings manager
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class Settings : public Singleton<Settings>
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{
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CAT_SINGLETON(Settings);
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Mutex _lock;
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protected:
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static const u32 KEY_HASH_SALT = 0xbaddecaf;
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static const int SETTINGS_HASH_BINS = 256;
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SettingsKey *hbtrees[SETTINGS_HASH_BINS]; // hash table of binary trees
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bool readSettings; // Flag set when settings have been read from disk
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bool modified; // Flag set when settings have been modified since last write
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std::string _settings_file;
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protected:
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SettingsKey *addKey(const char *name);
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SettingsKey *getKey(const char *name);
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SettingsKey *initInt(const char *name, int n, bool overwrite);
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SettingsKey *initStr(const char *name, const char *value, bool overwrite);
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void clear();
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public:
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void readSettingsFromFile(const char *file_path = "settings.txt", const char *override_file = "override.txt");
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void readSettingsFromBuffer(const char *data, int len);
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void write();
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public:
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int getInt(const char *name);
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const char *getStr(const char *name);
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int getInt(const char *name, int init);
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const char *getStr(const char *name, const char *init);
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void setInt(const char *name, int n);
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void setStr(const char *name, const char *value);
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};
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} // namespace cat
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#endif // CAT_SETTINGS_HPP
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