Function xdr_string

src/common/xdr.cpp:694–754

bool_t xdr_string(xdr_t* xdrs, SCHAR** sp, unsigned maxlength)
{
/**************************************
 *
 *	x d r _ s t r i n g
 *
 **************************************
 *
 * Functional description
 *	Encode, decode, or free a string.
 *
 **************************************/
	SCHAR trash[4];
	static const SCHAR filler[4] = { 0, 0, 0, 0 };
	ULONG length;

	switch (xdrs->x_op)
	{
	case XDR_ENCODE:
		length = static_cast<ULONG>(strlen(*sp));
		if (length > maxlength ||
			!PUTLONG(xdrs, reinterpret_cast<SLONG*>(&length)) ||
			!PUTBYTES(*sp, length))
		{
			return FALSE;
		}
		if ((length = (4 - length) & 3) != 0)
			return PUTBYTES(filler, length);
		return TRUE;

	case XDR_DECODE:
		if (!*sp)
		{
			*sp = (SCHAR*) XDR_ALLOC((ULONG) (maxlength + 1));
			// FREE: via XDR_FREE call to this procedure
			if (!*sp)			// NOMEM: return error
				return FALSE;
			DEBUG_XDR_ALLOC(xdrs, sp, *sp, (maxlength + 1));
		}
		if (!GETLONG(xdrs, reinterpret_cast<SLONG*>(&length)) ||
			length > maxlength || !GETBYTES(*sp, length))
		{
			return FALSE;
		}
		(*sp)[length] = 0;
		if ((length = (4 - length) & 3) != 0)
			return GETBYTES(trash, length);
		return TRUE;

	case XDR_FREE:
		if (*sp)
		{
			XDR_FREEA(*sp);
			DEBUG_XDR_FREE(xdrs, sp, *sp, (maxlength + 1));
			*sp = NULL;
		}
		return TRUE;
	}