Variables

simple access to value of XPE variables

as an integer

as a float

as a string

writing a basic C value to an XPE variable

C integer to XPE variable

C float to XPE variable

C string to XPE variable

copying values between XPE variables without knowing the types of the values involved

incrementing an XPE variables that holds an integer

simple non-optimised version

optimised version

 

accessing XPE variables

simple access to value of XPE variables

• using XPE variable fred as an integer

  	int	xint;
  
  	xint = XPE::get_variable("fred").get_int();
  


 
• using XPE variable fred as a float

  	float	xfloat;
  
  	xfloat = XPE::get_variable("fred").get_float();
  


 
• using XPE variable fred as a string

  	const char
  		*xstr;
  
  	xstr = XPE::get_variable("fred").get_str();
  

 

writing a basic C value to an XPE variable

• writing a C integer to an XPE variable

  	int	xint;
  
  	xint = 55;
  
  	XPE::get_variable("fred") = (long)xint;
  


 
• writing a C float to an XPE variable

  	float	xfloat;
  
  	xfloat = 55.5
  
  	XPE::get_variable("fred") = xfloat;
  


 
• writing a C string to an XPE variable

  	const char
  		*xstr;
  
  	xstr = "hello world";
  
  	XPE::get_variable("fred") = xstr;
  

 

copying values between XPE variables without knowing the types of the values involved

	XPE::get_variable("fred") = XPE::get_variable("jack");

 

incrementing an XPE variables that holds an integer

• simple non-optimised version

  	XPE::get_variable("fred") = XPE::get_variable("fred").get_int() + 1;
  


 
• optimised version

  	XPE::VALUE
  		&xval = XPE::get_variable("fred").get_xvalue();
  
  	xval = xval.get_int() + 1;