LuaNumber.h

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#ifndef LUANUMBER_H
#define LUANUMBER_H
 
#include <lua.h>
 
struct LuaNumber
{
    LuaNumber()
    : n(0.0)
    {}
 
    void read(lua_State * lua, int index)
    {
        n = lua_tonumber(lua, index);
    }
 
    bool readField(lua_State * lua, const char * name)
    {
        int returnType = lua_getfield(lua, 1, name);
 
        if (returnType == LUA_TNUMBER)
        {
            read(lua, 2);
            lua_pop(lua,1);
            return true;
        }
        else
        {
            lua_pop(lua,1);
            return false;
        }
    }
 
    bool readGlobal(lua_State * lua, const char * name)
    {
        int returnType = lua_getglobal(lua, name);
 
        if (returnType == LUA_TNUMBER)
        {
            read(lua, -1);
            lua_pop(lua,1);
            return true;
        }
        else
        {
            lua_pop(lua,1);
            return false;
        }
    }
 
 
    bool operator ==(const double & rhs){ return n == rhs; }
    operator double() { return n; }
    double n;
};
 
 
#endif /* LUANUMBER_H */