1 files changed, 146 insertions, 0 deletions
diff --git a/src/script/cvar.h b/src/script/cvar.h
new file mode 100644
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+++ b/src/script/cvar.h
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+// This file is part of Tremulous.
+// Copyright © 2016 Victor Roemer (blowfish) <victor@badsec.org>
+// Copyright (C) 2015-2019 GrangerHub
+// 
+// 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 3 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, see <http://www.gnu.org/licenses/>.
+
+// It's quite possible this is _way over the top_ but I've been toying
+// with several ideas. -Victor
+
+#ifndef __cplusplus
+#error __file__ " is only available to C++"
+#endif
+
+#ifndef SCRIPT_CVAR_H
+#define SCRIPT_CVAR_H
+
+#include <iostream>
+#include <exception>
+
+#include "qcommon/cvar.h"
+#include "qcommon/q_shared.h"
+#include "qcommon/qcommon.h"
+
+namespace sol
+{
+    class state;
+};
+
+namespace script
+{
+    ////////////////////////////////////////////// Exceptions ////////////
+    class CvarInvalidName : public std::exception {
+    public:
+        virtual const char* what() const throw()
+        { return "cvar name is invalid"; }
+    };
+
+    class CvarNotFound : public std::exception {
+    public:
+        virtual const char* what() const throw()
+        { return "cvar does not exist"; }
+    };
+
+    class CvarReadOnly : public std::exception { 
+    public:
+        virtual const char *what() const throw()
+        { return "cvar is readonly"; }
+    };
+
+    class CvarWriteProtected : public std::exception { 
+    public:
+        virtual const char *what() const throw()
+        { return "cvar is write protected"; }
+    };
+
+    class CvarCheatProtected : public std::exception {
+    public:
+        virtual const char *what() const throw()
+        { return "cvar is cheat protected"; }
+    };
+
+    class CvarLatchedUnsupported : public std::exception {
+    public:
+        virtual const char *what() const throw()
+        { return "modifying latched cvars is unsupported"; }
+    };
+
+    extern "C" cvar_t *cvar_cheats;
+    ////////////////////////////////////////////// class Cvar ////////////
+    struct Cvar {
+    private:
+        cvar_s *my = nullptr;
+
+        Cvar() = delete;
+
+    public:
+        Cvar(cvar_s* var)
+            : my(var)
+        { }
+ 
+        Cvar(std::string name)
+        { my = Cvar_Get(name.c_str(), "", 0); }
+    
+        Cvar(std::string name, std::string value)
+        { my = Cvar_Get(name.c_str(), value.c_str(), CVAR_ARCHIVE); }
+    
+        Cvar(std::string name, std::string value, int flags)
+        { my = Cvar_Get(name.c_str(), value.c_str(), flags); }
+    
+        void set_value(const char*value)
+        {
+            if ( !my )
+                throw CvarNotFound();
+            else if ( my->flags & CVAR_ROM )
+                throw CvarReadOnly();
+            else if ( my->flags & CVAR_INIT )
+                throw CvarWriteProtected();
+            else if ( my->flags & CVAR_CHEAT && !cvar_cheats->integer )
+                throw CvarCheatProtected();
+            else if ( (my->flags & CVAR_LATCH) )
+                throw CvarLatchedUnsupported();
+            else if ( !value )
+                value = my->resetString;
+            value = Cvar_Validate(my, value, false);
+
+            cvar_modifiedFlags |= my->flags;
+
+            my->modified = true;
+            my->modificationCount++;
+            my->string = CopyString(value);
+            my->value = atof(my->string);
+            my->integer = atoi(my->string);
+        }
+
+        std::string get_value()
+        { return my->string; }
+
+        std::string get_key()
+        { return my->name; }
+    };
+    
+    namespace cvar {
+        static inline void init(sol::state&& lua)
+        {
+            lua.new_usertype<Cvar>(
+                    "cvar", sol::constructors<sol::types<std::string>,
+                            sol::types<std::string, std::string>,
+                            sol::types<std::string, std::string, int>>(),
+                    "value", sol::property(&Cvar::get_value, &Cvar::set_value),
+                    "key", sol::property(&Cvar::get_key)
+            );
+        }
+    };
+};
+#endif