Reading arguments

The arguments are stored as ``named'' or ``numbered'' variables in the context. This NASL code:

f(1, "TWO", a: 33, z: "three");

will create four variables in the context, two ``numbered'' and two ``named'':

• 0 -> 1
• 1 -> "TWO"
• a -> 33
• z -> "three"

To read those arguments, you can use one of those functions:

• char* get_str_var_by_num (lex_ctxt* lexic, int num)
  reads the variable and converts it to a string if necessary. Do not free the result and do not call the function twice in a row on a non-string variable⁴⁸ without copying the result somewhere, as the function returns a pointer to a static buffer in this case.
  If the variable is not initialized or cannot be converted to character, NULL is returned.
• int get_int_var_by_num(lex_ctxt* lexic, int num, int default_value)
  reads the variable and converts it to an integer if necessary.
  If the variable is not initialized or cannot be converted, the default value is returned.
• char* get_str_local_var_by_num(lex_ctxt* lexic, const char* name)
• int get_int_local_var_by_num(lex_ctxt* lexic, int num, int default_value)
• int get_local_var_size_by_name
• int get_var_size_by_num