static struct ptunit_result sync_bwd_null(struct sync_fixture *sfix)
{
const uint8_t *sync;
int errcode;
errcode = pt_sync_backward(NULL, sfix->config.begin, &sfix->config);
ptu_int_eq(errcode, -pte_internal);
errcode = pt_sync_backward(&sync, NULL, &sfix->config);
ptu_int_eq(errcode, -pte_internal);
errcode = pt_sync_backward(&sync, sfix->config.begin, NULL);
ptu_int_eq(errcode, -pte_internal);
return ptu_passed();
}
static struct ptunit_result sync_bwd_none(struct sync_fixture *sfix)
{
const uint8_t *sync;
int errcode;
errcode = pt_sync_backward(&sync, sfix->config.end, &sfix->config);
ptu_int_eq(errcode, -pte_eos);
return ptu_passed();
}
static struct ptunit_result sync_bwd_past(struct sync_fixture *sfix)
{
const uint8_t *sync;
int errcode;
sfix_encode_psb(sfix->config.end - ptps_psb);
errcode = pt_sync_backward(&sync, sfix->config.end - ptps_psb,
&sfix->config);
ptu_int_eq(errcode, -pte_eos);
return ptu_passed();
}
static struct ptunit_result sync_bwd(struct sync_fixture *sfix)
{
const uint8_t *sync;
int errcode;
sfix_encode_psb(sfix->config.begin + 0x23);
errcode = pt_sync_backward(&sync, sfix->config.end, &sfix->config);
ptu_int_eq(errcode, 0);
ptu_ptr_eq(sync, sfix->config.begin + 0x23);
return ptu_passed();
}
int pt_pkt_sync_backward(struct pt_packet_decoder *decoder)
{
const uint8_t *pos, *sync;
int errcode;
if (!decoder)
return -pte_invalid;
pos = decoder->sync;
if (!pos)
pos = decoder->config.end;
errcode = pt_sync_backward(&sync, pos, &decoder->config);
if (errcode < 0)
return errcode;
decoder->sync = sync;
decoder->pos = sync;
return 0;
}