Method: FFI::Buffer#order

Defined in:
ext/ffi_c/Buffer.c

#order ⇒ :big, :little #order(order) ⇒ self

Set or get endianness of Buffer.

Overloads:

  • #order ⇒ :big, :little

    Get endianness of Buffer.

    Returns:

    • (:big, :little)
  • #order(order) ⇒ self

    Set endianness of Buffer (:network is an alias for :big).

    Parameters:

    • order (:big, :little, :network)

    Returns:

    • (self) 


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# File 'ext/ffi_c/Buffer.c', line 285

static VALUE
buffer_order(int argc, VALUE* argv, VALUE self)
{
    Buffer* ptr;

    TypedData_Get_Struct(self, Buffer, &buffer_data_type, ptr);
    if (argc == 0) {
        int order = (ptr->memory.flags & MEM_SWAP) == 0 ? BYTE_ORDER : SWAPPED_ORDER;
        return order == BIG_ENDIAN ? ID2SYM(rb_intern("big")) : ID2SYM(rb_intern("little"));
    } else {
        VALUE rbOrder = Qnil;
        int order = BYTE_ORDER;

        if (rb_scan_args(argc, argv, "1", &rbOrder) < 1) {
            rb_raise(rb_eArgError, "need byte order");
        }
        if (SYMBOL_P(rbOrder)) {
            ID id = SYM2ID(rbOrder);
            if (id == rb_intern("little")) {
                order = LITTLE_ENDIAN;

            } else if (id == rb_intern("big") || id == rb_intern("network")) {
                order = BIG_ENDIAN;
            }
        }
        if (order != BYTE_ORDER) {
            Buffer* p2;
            VALUE retval = slice(self, 0, ptr->memory.size);

            TypedData_Get_Struct(retval, Buffer, &buffer_data_type, p2);
            p2->memory.flags |= MEM_SWAP;
            return retval;
        }

        return self;
    }
}