Libs/VarVisitorsLua.hpp

   1 /*
   2 Cafu Engine, http://www.cafu.de/
   3 Copyright (c) Carsten Fuchs and other contributors.
   4 This project is licensed under the terms of the MIT license.
   5 */
   6
   7 #ifndef CAFU_TYPESYS_VAR_VISITORS_LUA_HPP_INCLUDED
   8 #define CAFU_TYPESYS_VAR_VISITORS_LUA_HPP_INCLUDED
   9
  10 #include "Variables.hpp"
  11
  12
  13 struct lua_State;
  14
  15
  16 namespace cf
  17 {
  18     namespace TypeSys
  19     {
  20         /// This visitor is used to implement a "get()" function in Lua:
  21         /// It pushes the value(s) of the visited variable onto the Lua stack.
  22         class VarVisitorGetToLuaT : public cf::TypeSys::VisitorConstT
  23         {
  24             public:
  25
  26             VarVisitorGetToLuaT(lua_State* LuaState);
  27
  28             unsigned int GetNumResults() const { return m_NumResults; }
  29
  30             void visit(const cf::TypeSys::VarT<float>& Var);
  31             void visit(const cf::TypeSys::VarT<double>& Var);
  32             void visit(const cf::TypeSys::VarT<int>& Var);
  33             void visit(const cf::TypeSys::VarT<unsigned int>& Var);
  34             void visit(const cf::TypeSys::VarT<uint16_t>& Var);
  35             void visit(const cf::TypeSys::VarT<uint8_t>& Var);
  36             void visit(const cf::TypeSys::VarT<bool>& Var);
  37             void visit(const cf::TypeSys::VarT<std::string>& Var);
  38             void visit(const cf::TypeSys::VarT<Vector2fT>& Var);
  39             void visit(const cf::TypeSys::VarT<Vector3fT>& Var);
  40             void visit(const cf::TypeSys::VarT<Vector3dT>& Var);
  41             void visit(const cf::TypeSys::VarT<BoundingBox3dT>& Var);
  42             void visit(const cf::TypeSys::VarArrayT<uint32_t>& Var);
  43             void visit(const cf::TypeSys::VarArrayT<uint16_t>& Var);
  44             void visit(const cf::TypeSys::VarArrayT<uint8_t>& Var);
  45             void visit(const cf::TypeSys::VarArrayT<std::string>& Var);
  46
  47
  48             private:
  49
  50             lua_State*   m_LuaState;
  51             unsigned int m_NumResults;
  52         };
  53
  54
  55         /// This visitor is used to implement a "set()" function in Lua:
  56         /// It sets the value of the visited variable to the value(s) taken from the Lua stack.
  57         class VarVisitorSetFromLuaT : public cf::TypeSys::VisitorT
  58         {
  59             public:
  60
  61             VarVisitorSetFromLuaT(lua_State* LuaState);
  62
  63             void visit(cf::TypeSys::VarT<float>& Var);
  64             void visit(cf::TypeSys::VarT<double>& Var);
  65             void visit(cf::TypeSys::VarT<int>& Var);
  66             void visit(cf::TypeSys::VarT<unsigned int>& Var);
  67             void visit(cf::TypeSys::VarT<uint16_t>& Var);
  68             void visit(cf::TypeSys::VarT<uint8_t>& Var);
  69             void visit(cf::TypeSys::VarT<bool>& Var);
  70             void visit(cf::TypeSys::VarT<std::string>& Var);
  71             void visit(cf::TypeSys::VarT<Vector2fT>& Var);
  72             void visit(cf::TypeSys::VarT<Vector3fT>& Var);
  73             void visit(cf::TypeSys::VarT<Vector3dT>& Var);
  74             void visit(cf::TypeSys::VarT<BoundingBox3dT>& Var);
  75             void visit(cf::TypeSys::VarArrayT<uint32_t>& Var);
  76             void visit(cf::TypeSys::VarArrayT<uint16_t>& Var);
  77             void visit(cf::TypeSys::VarArrayT<uint8_t>& Var);
  78             void visit(cf::TypeSys::VarArrayT<std::string>& Var);
  79
  80
  81             private:
  82
  83             lua_State* m_LuaState;
  84         };
  85
  86
  87         /// This visitor is used to set `float` values in variables that are of type `float`, or composed of `float`.
  88         class VarVisitorSetFloatT : public cf::TypeSys::VisitorT
  89         {
  90             public:
  91
  92             VarVisitorSetFloatT(unsigned int Suffix, float Value);
  93
  94             void visit(cf::TypeSys::VarT<float>& Var);
  95             void visit(cf::TypeSys::VarT<double>& Var);
  96             void visit(cf::TypeSys::VarT<int>& Var);
  97             void visit(cf::TypeSys::VarT<unsigned int>& Var);
  98             void visit(cf::TypeSys::VarT<uint16_t>& Var);
  99             void visit(cf::TypeSys::VarT<uint8_t>& Var);
 100             void visit(cf::TypeSys::VarT<bool>& Var);
 101             void visit(cf::TypeSys::VarT<std::string>& Var);
 102             void visit(cf::TypeSys::VarT<Vector2fT>& Var);
 103             void visit(cf::TypeSys::VarT<Vector3fT>& Var);
 104             void visit(cf::TypeSys::VarT<Vector3dT>& Var);
 105             void visit(cf::TypeSys::VarT<BoundingBox3dT>& Var);
 106             void visit(cf::TypeSys::VarArrayT<uint32_t>& Var);
 107             void visit(cf::TypeSys::VarArrayT<uint16_t>& Var);
 108             void visit(cf::TypeSys::VarArrayT<uint8_t>& Var);
 109             void visit(cf::TypeSys::VarArrayT<std::string>& Var);
 110
 111
 112             private:
 113
 114             unsigned int m_Suffix;
 115             float        m_Value;
 116         };
 117
 118
 119         /// This visitor writes the value of the visited variable into the given std::ostream,
 120         /// formatted as Lua code.
 121         class VarVisitorToLuaCodeT : public cf::TypeSys::VisitorConstT
 122         {
 123             public:
 124
 125             VarVisitorToLuaCodeT(std::ostream& Out);
 126
 127             void visit(const cf::TypeSys::VarT<float>& Var);
 128             void visit(const cf::TypeSys::VarT<double>& Var);
 129             void visit(const cf::TypeSys::VarT<int>& Var);
 130             void visit(const cf::TypeSys::VarT<unsigned int>& Var);
 131             void visit(const cf::TypeSys::VarT<uint16_t>& Var);
 132             void visit(const cf::TypeSys::VarT<uint8_t>& Var);
 133             void visit(const cf::TypeSys::VarT<bool>& Var);
 134             void visit(const cf::TypeSys::VarT<std::string>& Var);
 135             void visit(const cf::TypeSys::VarT<Vector2fT>& Var);
 136             void visit(const cf::TypeSys::VarT<Vector3fT>& Var);
 137             void visit(const cf::TypeSys::VarT<Vector3dT>& Var);
 138             void visit(const cf::TypeSys::VarT<BoundingBox3dT>& Var);
 139             void visit(const cf::TypeSys::VarArrayT<uint32_t>& Var);
 140             void visit(const cf::TypeSys::VarArrayT<uint16_t>& Var);
 141             void visit(const cf::TypeSys::VarArrayT<uint8_t>& Var);
 142             void visit(const cf::TypeSys::VarArrayT<std::string>& Var);
 143
 144
 145             private:
 146
 147             void WriteString(const std::string& s) const;
 148
 149             std::ostream& m_Out;
 150         };
 151     }
 152 }
 153
 154 #endif