Re: lua userdata question

[Michael Roth <mroth@...>]

>      typedef struct
>      {
>          int size;
>          double x_values[1];  /* x variable part */
>          double y_values[1];  /* y variable part */
>      } PairArray;

Get your data structures and types right and don't fight against the language 
but instead use its features:

	typedef struct
	{
		double x;
		double y;
	} Pair;

	typedef struct
	{
		int size;
		Pair values[];
	} PairArray;


>      static PairArray PairArray_alloc(lua_State *L, int size)
>      {
>          size_t nbytes = sizeof(PairArray) + 2*sizeof(double)*(size-1);

	size_t nbytes = sizeof(PairArray) + size * sizeof(Pair);


-- 
Michael Roth